Saturday, 3 April 2021

Covidiot News - If Hospitals Stay Open, Why Close Our Church? ( Hawaiian Pastor)

King’s Cathedral in Maui, Hawaii, USA
Maui church linked to at least 55 COVID cases refuses to cancel in-person services

Pastor James Marocco, of the Church of the Sacred Covid Super-Spreader, aka, King's Cathedral, in Kahului, Maui, Hawaii, has come out with what must rate as one of the most bizarre, if not the most bizarre, arguments for refusing to close his church to help contain a massive cluster of Covid-19 cases already traced back to services in his church. He is arguing that because the authorities didn't close the local hospital when it was being overwhelmed by cases, they should keep his church open too!

According to this report in HawaiiNewsNow:

Filling The God-Shaped Gaps - How Bone Evolved

An impression of the placoderm fish living 380 million years ago.

Tomography brings insights into the early evolution of bones - Helmholtz-Zentrum Berlin (HZB)

When bone first appeared in the fossil record, it did not contain the bone cells (osteocytes) that are today considered essential for normal bone growth and development, so where did they come from? This is the sort of gap any diligent Creationist would look for and, when found, would plonk their god firmly in it, declare the fit to be perfect and proclaim the question answered, in the only way permitted to a Creationist - God did it!

But, as usual, when science looks in these gaps, Creationism's god is nowhere to be seen. Instead, they find it was never there at all because it was merely an illusion caused by gaps in the record, not gaps in the entirely natural processes that brought about the world as we see it today. As always, what is evolved out of what was, without magic or the involvement of a clever invisible magic sky man.

Just such a gap was closed recently by a team of scientists working for the Museum für Naturkunde Berlin, headed by Dr Florian Witzmann who used the focussed ion beam of a scanning electron microscope at the Helmholtz-Zentrum Berlin (HZB) to examine the bone structures of 400 million year-old fossils of marine life in nanometre-scale, to calculate unprecedented 3D detail. The scientists believe they have even identified the environmental factor which drove this evolution - a shortage of the essential mineral, phosphorus.

As the Helmholtz-Zentrum press release explains:

Friday, 2 April 2021

Malevolent Designer News - How 1 in 4 Adult Sea Lions Get Cervical Cancer

1 / 7
Californian Sea Lion, Zalophus californianus
2 / 6
Californian Sea Lion, Zalophus californianus
3 / 6
Californian Sea Lion, Zalophus californianus
4 / 6
Californian Sea Lion, Zalophus californianus
5 / 6
Californian Sea Lion, Zalophus californianus
6 / 6
Californian Sea Lion, Zalophus californianus
Herpesvirus Triggers Cervical Cancer Affecting Nearly 1 in 4 Adult Sea Lions, Parallels to Human Cancer Research - The Marine Mammal Center

Creationist mode:


The Intelligent designer has really pulled out the stops with this one!

It's only gone and designed a special virus to give sea lions cancer, and it's made it so it's sexually transmitted too!

According to researchers at The Marine Mammal Center in Sausalito, CA, USA, the cause of the cancer that is killing so many Californian sea lions, is a herpesevirus that has infected 1 in 4 sea lions.

The cancer starts in the genital tract of the sea lion then rapidly spreads throughout the internal organs. Sea lions that wash up on California's beaches suffering from the disease are normally in the terminal stages and so have to be euthanised humanely to prevent further suffering.

Mind you, clever and mendacious though it is, the intelligent designer needed a bit of help from humans with this one, albeit unwitting help. The problem appears to be exacerbated by man-made pollution with nasty chemicals like DDT and PCB. A lot of DDT was dumped in the sea around Southern California, which is one of the main habitats for these sea lions. DDT, especially, was once widely used as a general insecticide but proved to be extremely harmful to a multitude of species and was banned in most countries. However, it is very stable and stays in the environment for tens or even hundreds of years, being ingested, concentrated up the food chain, at the top of which sit species such as the sea lion, and put back into the environment when the animal dies, to be ingested again and recycled.

Nevertheless, the herpes virus was a brilliant masterstroke that really causes suffering, especially after the sea lions have been sexually active, so the sea lion's (geddit?!) share of the credit has to go to the malevolent designer of this nasty little virus!

The Marine Mammal Center news release tells the story:

Thursday, 1 April 2021

Making Artificial Life. A Cell With A Minimal Synthetic Genome That Lives and Replicates Normally

Some of the first synthetic Mycoplasma bacteria produced by Craig Venter and his colleagues
Credit: Thomas Deerick, NCMIR/Science Photo Library
Genes necessary for cell division in modern bacterial cells identified | J. Craig Venter Institute

Scientists at the J. Craig Venter Institute at the Massachusetts Institute of Technology (MIT) have now produced an artificial cell that reproduces like any other single-celled organism.

In 2010 Venter produced the first cell with a synthetic genome when he constructed a genome that was almost identical to that of Mycoplasma mycoides, a bacterial parasite commonly found in goats.

In 2016, this genome was, stripped it down to its bare essentials to contain just 237 genes, to become the smallest known viable genome capable of independent living. However, there was something not quite right about the way this cell (termed Mycoplasma mycoides JCVI-syn3.0) because when it replicated, the daughter cells were not equal in size, as they are in the wild type and in Venter's 2010 version (JVCI-syn1.0). It became apparent that some genes needed for normal replication had been removed along with about half the genome to reduce it down to 237 genes.

Evolution News - And Today's 'Non-Existent' Missing Link Is...

A computer model of the novel protein structure in the cryptophyte's antenna that traps sunlight energy.
Picture: UNSW
Mystery of photosynthetic algae evolution finally solved | UNSW Newsroom

A 'missing link' protein that shows the transition between two ancient species of algae, red algae and cryptophytes.

This was a mystery that had been eluding molecular biologists for decades and it was only found because of the stay-at-home regulations to mitigate the Covid-19 pandemic and because of international cooperation. The discovery was made by biologists based at the University of New South Wales, Sydney, NSW, Australia, The University of Queensland, St Lucia, QLD, Australia and the University of British Columbia, Vancouver, BC, Canada. There findings were published a few days ago, open access in Nature Communications.

The University of New South Wales news release by Lachlan Gilbert tells the story:

Wednesday, 31 March 2021

Atheism - Winning More

The pews are emptying in increasingly irreligious USA

Sourc: Gallup
U.S. Church Membership Falls Below Majority for First Time

Congratulations to America for joining the rest of the developed world, where religious non-affiliation and increasing secularisation of society are now the norm.

The latest Gallop poll shows that church, synagogue or mosque membership in the USA has fallen below 50% for the first time. Now at just 47%, this represents a 26% percentage point fall since 1937 when Gallop first began polling. And the downward trend show signs of accelerating, falling 22 percentage points since the turn of the millennium and 8 percentage points since 2015.

Tuesday, 30 March 2021

Trumpanzee Cult News - Amnesiac Trump Rewriting History

Donald Trump uses new website to rewrite history of his presidency | Donald Trump | The Guardian

According to this report in the Guardian, President reject, Donald J Trump, has launched his new cult website (45Office.com) with an account of his disastrous presidency in which he appears to have forgotten certain key events.

Consistent with his narcissistic personality disorder, it is full of self-praise and 'alternative facts', such as his claim to have acted decisively over the coronavirus pandemic and implying that he was personally responsible for innovative medical treatments and two vaccines. What he 'forgot' to mention was that he had dismantled the plans and contingencies that his predecessor, Barak Obama had put in place in preparedness for just such a pandemic, in his obsessive zeal to undo everything Obama had done.

In what could pass for a parody of the kind of self-eulogising, and disregard for the facts, that characterises Trump's personality disorder, in his opening 885-word braggadocio, written in the third person, which is hard to read without laughing out loud, he says:

Evolution News - Solving Darwin's "Abominable Mystery"

Research into the flower preferences of pollinating moths may have delivered a vital clue to the simple factors needed for the emergence of new species.
Pioneering pollinator study offers clues to Darwin’s “abominable mystery”

With characteristic intellectual honesty, Charles Darwin was always quick to acknowledge difficulties for his theory of evolution by natural selection, one of which he called an 'abominable mystery' in a letter to his close friend, botanist and explorer Dr Joseph Hooker in 1879. He wrote:
The rapid development as far as we can judge of all the higher plants within recent geological times is an abominable mystery... Nothing is more extraordinary in the history of the Vegetable Kingdom, as it seems to me, than the apparently very sudden or abrupt development of the higher plants. I have sometimes speculated whether there did not exist somewhere during long ages an extremely isolated continent perhaps near the South Pole.
This 'mystery' had been used by Scottish botanist William Carruthers, keeper of botany at the British Museum, to argue for divine intervention in a 1876 lecture to the Geologists Association.

Now researchers Kelsey J. R. P. Byers and H. D. Bradshaw Jr., working at the Department of Biology, University of Washington, Seattle, WA, USA think they have gone some way to solving this mystery. The press release by the John Innes Centre explains:

Monday, 29 March 2021

Evolution News - The Origins of the Scythians

Summary maps visualizing the main findings of the research. Figure from the article.
© Gnecchi-Rusconi, et al., 2021
Ancient Genomes Trace the Origin and Decline of the Scythians | Max Planck Institute for the Science of Human History

This is my second blog post concerning the origins of historic cultural groups, the first being about the Basques of Northeast Spain and Southwest France. This new understanding has been made possible by advances in recovering DNA from ancient sources and techniques for analysing the results. In effect, it is the result of applied evolutionary theory.

The nomadic Scythians were a major force in Eurasia during the first millennium BCE. Their domestication of the horse allowed them to dominate the steppes of Central Asia and spread far and wide. Then they declined and disappeared from history.

Where they came from, how they relate to other Eurasia peoples and why they disappeared has long been a mystery for historians, but now the work of the Max Planck Institute for the Science of Human History, by analysing the DNA from the remains they left in their burial mounds is providing some answers. As always, the DNA shows the evolutionary changes and relationships that the Theory of Evolution leads us to expect. As the press release from the Max Planck Institute tells the story:

Generally thought of as fierce horse-warriors, the Scythians were a multitude of Iron Age cultures who ruled the Eurasian steppe, playing a major role in Eurasian history. A new study published in Science Advances analyzes genome-wide data for 111 ancient individuals spanning the Central Asian Steppe from the first millennia BCE and CE. The results reveal new insights into the genetic events associated with the origins, development and decline of the steppe’s legendary Scythians.


Evolution News - The Origin and Genetic Uniqueness of the Basques

Color representation of the mixture and genetic structure in the Basque Country; the green symbolizing the Basques, and the blue and red blends it with the surrounding populations.
Credit: André Flores-Bello.
They reveal the origin and genetic uniqueness of the Basques

Isolated populations can either stay completely isolated and so gradually diverge from other populations of the same species by a combination of natural selection and genetic drift, or they can continue to exchange DNA with other neighbouring groups and so eventually merge and disappear as genetically distinct populations.

This true for all species, whether birds, mammals, reptiles or insects or, as in the case of the Basque people of Northeast Spain and Southwest France, humans.

A study by a mixed team from Spain and France, led by David Comas of the Departament de Ciències de la Salut i de la Vida, Institut de Biologia Evolutiva (CSIC-UPF), Universitat Pompeu Fabra, Barcelona, Spain has shown how the Basque people have retained genetic continuity with their Iron Age ancestors and have resisted genetic mixing with their neighbours, by a combination of linguistic, cultural and geographical barriers to gene flow.

As the news item from Universitat Pompeu Fabra, Barcelona, auto-translated from Catalan, explains:

Evolution News - Evolution by Horizontal Gene Transfer

Siverleaf whitefly, Bernisia tabaci
Photo: Nigel Cattlin/Alamy
Whitefly hijacks a plant detoxification gene that neutralizes plant toxins: Cell

A couple of days ago, I reported on the case of evolution by the rare process of gene shuffling in a species of bird, to bring about a new combination, reinforced by pre-zygotic barriers because the new combination gave a new plumage display and so new assortative mating behaviour.

This time we have an example of horizontal gene transfer giving species of whitefly a significant advantage over those without the newly-acquired gene. Although this is common in protozoans, it is rare in multicellular animals and previously unknown between plants and insects.

Sunday, 28 March 2021

Trumpanzee News - Explaining Donald Trump's Narcissistic Personality Disorder

US Presidential reject, Donald J Trump.
Acute Narcissistic personality disorder personified
Narcissism Driven by Insecurity, Not Grandiose Sense of Self, New Psychology Research Shows

A psychology paper published a few days ago by researchers at New York University, sheds some light on Donald Trump's self-evident Narcissistic Personality Disorder (NPD). Although it doesn't name his as such, it could be describing his personality and idiosyncratic behaviour.

The open access paper shows how NPD is not driven by an inflated sense of self-worth but by insecurity and self-loathing in disguise. The question is then, what in his background caused this self-loathing in Donald Trump? We would almost certainly have to go back into his childhood and probably his relationship with his, by all accounts, particularly unpleasant and odious, psychopathic father.

From the NYU news release:

Saturday, 27 March 2021

The Very First Structures in the Universe

The results of the simulation show the growth of tiny, extremely dense structures very soon after the inflation phase of the very early universe. Between the initial and final states in the simulation (top left and right respectively), the area shown has expanded to ten million times its initial volume, but is still many times smaller than the interior of a proton. The enlarged clump at the bottom left would have a mass of about 20kg.

Photo: Jens Niemeyer, University of Göttingen
The very first structures in the Universe - Georg-August-Universität Göttingen

Never having been especially interested in physics which, compared to biology, I found dry and uninteresting - probably wrongly - this subject is not something I can claim any great understanding of, but this simulation addresses the first few microseconds after the Big Bang, in the instance before the larger structures such as elementary particles came into existence.

It has been said that the initial density of the universe at this time was some trillion times that of water. Just how dense can be judged from the fact that, according to this computer simulation, some 10-24 seconds after the BB, bodies smaller than a proton had a mass of about 20 Kg! These 'inflaton halos' were responsible for the rapid inflation of the nascent Universe.

The simulation was done by theoretical physicists at the Universities of Göttingen, Germany and Auckland, New Zealand. The press release from Georg-August-Universität, Göttingen gives the details:

Evolution News - Rapid Evolution by Genetic Shuffling

Iberá Seedeater, Sporophila iberaensis
Endangered songbird challenging assumptions about evolution | Colorado Arts and Sciences Magazine | University of Colorado Boulder

A group of researchers led by Sheela P. Turbek of the Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA have identified a rare form of evolution in a group of birds known collectively as the southern capuchino seedeaters. The process, known as genetic shuffling, had only been observed once before, in African in the cichlid fish of Lake Victoria and is believed to be behind the recent evolution of a new species, the Iberá Seedeater, Sporophila iberaensis.

In addition to speciation by gene shuffling - where a new species arises by recombining existing genes in a unique combination, this species of bird also illustrates how speciation can be maintained by pre-zygotic barriers to hybridization, that arise through natural selection because hybrids with intermediate characteristics may be at a disadvantage, having intermediate specialisations.

Friday, 26 March 2021

Trumpanzee Fruitloop News - MAGA Pastor Becoming Even More Loopy

Shane Vaughn, First Harvest Ministries
Shane Vaughn Says He's Been Called By God to Denounce 'The Sin of the Biden Administration' | Right Wing Watch

Readers may remember Talibangelical Trumpanzee nut-job and self-appointed Prophet of God, Shane Vaughn, who was one of my sample of three Trumpanzee false prophets. Vaughn had prophesied a Trump win in November 2020 and was, like the many other false prophets who did likewise, desperately trying to explain why his false prophesy wasn't actually false and that he really had, despite all the evidence, related God's inerrant word to his dupes... er... followers.

Vaughn had earlier prophesied that Trump would never be impeached, after he had already been impeached the first time and shortly before he became the only president in American history to be impeached twice.

He also claimed that Trump losing in November had all been part of God's plan, so that Trump can serve twelve terms! Seriously!

Now Vaughn is claiming he has been given a special mission by God “to raise my voice against the sin of the Biden administration". Comparing himself to the biblical prophet, Elijah and Kamal Harris to Jezebel, and revealing his obsession with Kamal Harris (not a hint of racism or misogyny there, obviously!) he told his followers:

Thursday, 25 March 2021

Evolution News - The Simple Mutation That Makes Us Human

Human brain organoid
Credit: S.Benito-Kwiecinski/MRC LMB/Cell
How humans develop larger brains than other apes – UKRI

A team led by researchers at the Medical Research Council (MRC) Laboratory of Molecular Biology (LMB) has identified a simple genetic switch that makes human brain organoids grow more like ape brains, and vice versa.

Organoids are the result of stem cells grown in vitro, in this case stem cells that would normally grow into brains in the developing embryo. The team discovered the 'switch' in the form of the gene 'ZEB2' which turns on sooner in the gorilla brain than the human brain. When this switch is delayed in the developing gorilla organoid, the cells multiply faster and the organoid grows like a human brain, and when turned on earlier in the developing human organoid it grows like gorilla brain tissue.

The change in the timing of this switch is probably the evolutionary change that allows the human brain to grow to something like three times the volume of the brains of the other apes.

From the UK Research and Innovations News item:

Wednesday, 24 March 2021

Biodiversity News - A New Species of Chameleon From Ethiopia

1 / 8
The new chameleon species, Trioceros wolfgangboehmei
Credit: Koppetsch et al.
2 / 8
Living individual of Trioceros wolfgangboehmei
Credit: Koppetsch et al.
3 / 8
Head detail of the new chameleon, Trioceros wolfgangboehmei
Credit: Koppetsch et al.
4 / 8
Harenna Forest, Bale Mountains, Ethiopia.
5 / 8
View from the deck of Bale Mountain Lodge
6 / 8
Lateral detail of a living Trioceros wolfgangboehmei sp. nov. from Goba, Ethiopia, showing the heterogeneous body scalation with both small scattered tubercles and enlarged flattened plate-like scales. In this individual the dorsolateral stripe is interrupted and forms a Y-shaped pattern on the flanks.
Photo by Petr Nečas.
7 / 8
Living juvenile of Trioceros wolfgangboehmei sp. nov. from Goba, Ethiopia.
Photo by Petr Nečas.
8 / 8
Digital elevation map of Ethiopia (generated by using the geographic information system ArcGIS 10.0; elevation in m a.s.l) indicating the currently known distribution of Trioceros wolfgangboehmei sp. nov. east of the Ethiopian Rift in the northern Bale Mountains (red stars; left star: Dinsho, right star: Goba). Black star: Addis Abeba. Grey dots show records of T. affinis based on distributional data after Largen and Spawls (2010) and Ceccarelli et al. (2014).
Highlands of diversity: Another new chameleon from the Bale region, Ethiopia | Pensoft blog

Here is another example of why fragile and vulnerable habitats need to be preserved, if only for the rich variety of new species that could be living there.

This time it is a new species of chameleon from the Bale Mountain forests of Ethiopia. This one was discovered by zoologists Thore Koppetsch and Benjamin Wipfler of the Research Museum Alexander Koenig in Bonn, Germany, and Petr Nečas from the Czech Republic. The new species, Trioceros wolfgangboehmei is a new small-sized chameleon living on the edge of the forest. Their findings were published in the open-access, peer-reviewed life science journal Zoosystematics and Evolution.

The Pensoft blog explains:

Evolution News - Science is Filling God-Shaped Gaps With Knowledge

A slab of shale with well-preserved macrofossils of algae.

Photo: K. Maloney.
Rare fossilized algae, discovered unexpectedly, fill in evolutionary gaps | The Geological Society of America.

More bad news for Creationists. A chance discovery in the mountains of Canada’s remote Yukon territory, by geobiology graduate student Katie Maloney, has filled in another of those precious god-shaped gaps and provided yet another of those pesky transitional forms that aren't supposed to exist.

The news release from the Geological Society of America tells the story:

Tuesday, 23 March 2021

Evolution News - Turns Out Altruism Is For The Fish

Convict chichlid, Amatitlania nigrofasciata
Turns out altruism is for the fish — Osaka City University

Christian fundamentalists will confidently assure you that their religion gives them superior morals to Atheists and members of other religions because they get their morals direct from a perfect god who defines right and wrong. Almost invariably, of course, the same fundamentalists who need to boast about their supposed superior morals are using religion for the excuses it gives them for otherwise unacceptable, antisocial attitudes and behaviour like homophobia, misogyny and/or racism, but that's another issue.

One of the claims they will make against Atheists, for example, is that Atheists see no reason not to be selfish, whereas Christian fundamentalist are altruistic because they know this is the right thing to do, not because it is inherently right but because their god tells them to be and promises them a reward for altruism or punishment for selfishness.

However, evolution by natural selection, operating at the level of genes is fully capable of explaining altruism as an evolved behavioural trait because self-sacrifice can often ensure the survival of those descendants and close kin who are carrying copies of the genes for altruistic behaviour, so ensuring the survival, even at the expense of individual carriers, of those genes through time.

So, this gene-centred evolution should predict altruism in other species; species moreover which don not need to read the Bible to know right from wrong because they have an innate, inherited, set of pro-social behaviours which are also situational - the situation depending on the probability of helping the survival through time of the genes for that behaviour.

This is the finding of a group of researchers from Osaka City University, Japan, whose results were published open access in Nature Communications a few days ago. They have shown that male convict cichlid fish, Amatitlania nigrofasciata can vary their behaviour between pro-social and anti-social depending on the situation.

The Osaka City University new release explains:

Support for Church of England Collapsing in Secular Britain

Poll conducted March 22, 2021
Daily Question | 22/03/2021 | YouGov

A YouGov poll conducted a few days ago shows a very clear majority of Brits think the Church of England should not be entitled to have its bishops sitting in the upper chamber of our bicameral parliament, the House of Lords.

Historically, 26 seats in the HOL are reserved for Anglican bishops in addition to the seats occupied by retired former Archbishops of Canterbury and York who sit in their own right as Peers of the Realm. The 26 Anglican bishops and archbishops together make up the 'Lords Spiritual', and have done so since the Restoration in 1660.

Monday, 22 March 2021

The Pattern-Recognising Ape - Seeing Things That Aren't What They Seem

A composite image of the USS Jellyfish in Abell 2877 showing the optical Digitised Sky Survey (background) with XMM X-ray data (magenta overlay) and MWA 118 MHz radio data (red-yellow overlay).

Credit: Torrance Hodgson, ICRAR/Curtin University.
Astronomers see a ‘Space Jellyfish’ - ICRAR

In an interesting manifestation of the very human phenomenon of pareidolia (the ability to perceive things which are not really there in patterns) was published by The International Centre for Radio Astronomy Research (ICRAR) when announcing the findings of an Australian-Italian team using the Murchison Widefield Array (MWA) telescope to observe a cluster of galaxies known as Abell 2877.

What they 'saw' was a space 'jellyfish'!

Pareidolia is responsible for, for example, the multiple images of Jesus and Mary on toast or in the mess left by a dropped ice-cream. In one case, a chance damp patch on a newly-platered toilet wall in Mali was interpreted as the image of Mohammad at prayer, attracting several high-profile celebrities and politicians to come to see the 'miracle'.

Biodiversity News - 4 New Species of Lichen Found

Micarea stellaris is one of the recently described lichen species. The name refers to ´star´ and comes from intensely shining crystals that are visible when studying it in polarised light.
Scale bar 1 mm.
Vuria, the highest peak in the Taita Hills, reaches to over two Kilometres heigh. Land use has fragmented mountain forests.

Photo: Aannina Kantelinen
Montane cloud forest, Taita Hills, Kenya

Photo: Petri Pellikka
Ngongoni antilopes benefit from the tree cover destroyed by elephants during the dry spells as it increases grasslands in the dry savannah plains surrounding verdant Taita Hills.
Photo: Petri Pellikka
Four lichen species new to science discovered in Kenyan cloud forests | University of Helsinki

The fragility of Earth's biodiversity was highlighted a few days ago by news that researchers from the University of Helsinki Finnish Museum of Natural History, Luomus and the National Museums of Kenya, have recently discovered four new species of lichen, all of the Micrarea genus, growing in the mountain forests in Kenya's Taita Hills. This unique environment is under threat from increasing land use which is fragmenting the forests.

From the University of Helsinki news release:

Saturday, 20 March 2021

Evolution News - How to Make a Giraffe Without Using Magic

1 / 10
Photo credit: Mogens Trolle
2 / 10
Reticulated Giraffe, Buffalo Springs, Kenya.
Photo credit: Mogens Trolle
3 / 10
Help Us Stand Tall for Giraffes.
The U.S. is one of the leading importers of giraffe parts. We need your help persuading America’s leaders to protect them before they’re gone.

Photo by Philippe Chantecaille
4 / 10
"The Last Giraffes on Earth"
Source: The Atlantic
5 / 10
Image credit: San Diego Zoo
6 / 10
Giraffes, found throughout sub-Saharan Africa, are susceptible to poaching and habitat loss.

7 / 10
8 / 10
Giraffes on the Masai Mara National Reserve in Kenya.
Credit: Goran Tomasevic/Reuters
9 / 10
Reticulated sub-species of Giraffe at Loisaba conservancy in Laikipia, Kenya. As across the rest of African, they have declined steadily in recent decades.
Credit: AFP/Tony Karumba
10 / 10
Girafffes in the Masai Mara.
Credit: Manoj Shah/Getty
Source: BBC Wildlife
The Trouble of Being Tall – Biologisk Institut - Københavns Universitet

Researchers at the Biologisk Institut, University of Copenhagen, and Northwestern Polytechnical University in China have succeeded in sequencing the whole genome of the giraffe and in doing so have uncovered the mechanisms by which giraffes evolved their unique features.

Evolving a long neck and tall stature presented the giraffe with a number of physiological and anatomical challenges:
  • A very high blood pressure is needed to pump blood up to the brain. The giraffe BP is about twice the normal BP for a mammal and would normally cause severe damage to the cardiovascular system.
  • Standing up from a lying position is difficult, as is bending down to drink, making the giraffe especially vulnerable while sleeping and drinking.
  • At about 5 metres above the ground, there is little role for a sense of smell.
The researchers found a number of evolved genetic features which help giraffes overcome these problems, including a version of the FGFRL1 with seven amino acid substitutions compared with the same gene in other ruminants. When tested in mice, this gene gave them added protection against damage from high blood pressure and more compact, denser bones. The team believe the function of this gene may have application in the treatment of high blood pressure in humans.

As the Biologisk Institut news release explains:

Friday, 19 March 2021

Malevolent Designer News - Making the Leishmania Parasite Better at Making You Sick

Leishmania infantum life cycle

Dogs infected with Leishmania parasites smell more attractive to female sand flies | Lancaster University

Here is one of those papers that leave intelligent [sic] design creationists with two choices: they can either pretend that a designer who can come up with these sorts of designs is not really malevolent and being ever-more inventive in its endeavour to make us sick, or they can absolve it of any culpability by accepting that these things are the inevitable result of a purely natural, amoral, undirected natural process, operating under nothing more than the laws of physics and chemistry.

Cutaneous leishmaniasis ulcer
Credit: Layne Harris
Wikipedia
It is the discovery that female sand flies, Lutzomyia longipalpis, which are the main vectors for transmitting the parasite that causes Leishmaniasis to humans, are more attracted to dogs which are carrying the parasites than those which are healthy, so increasing the probability of infecting humans.

The discovery is the work of two scientists, Professor Gordon Hamilton and Monica E. Staniek, of Lancaster University.

The new release from Lancaster University explains:
Web Analytics