Some of the first animals on Earth were likely ancestors of the modern sea sponge, according to MIT geochemists who unearthed new evidence in very old rocks.
Image: Jose-Luis Olivares, MIT
The first animals on Earth may have been sea sponges, study suggests | MIT News | Massachusetts Institute of Technology
Another fatal blow against creationism was revealed recently by geochemists led by Professor Roger E. Summons of the Massachusetts Institute of Technology (MIT), with news that they have found chemical evidence in ancient rocks suggesting that the earliest animals may have been the ancestors of sponges, living some 541 million years ago. Their findings have just been published in Proceedings of the National Academy of Sciences of the USA.
They succeeded in extracting the chemical signature of animal life from rocks in Oman, where they found an abundance of steranes that they determined were the preserved remnants of 30-carbon (C30) sterols — a rare form of steroid that they showed was most likely derived from ancient sea sponges known as demosponges.
Not only is this fatal to creationists' notion of Earth being just a few thousand years old, with all living organisms magically created without ancestry and with different “kinds” unrelated to other “kinds”, but it also delivers another hammer blow to the creationist parody of the so-called 'Cambrian Explosion' as a literal explosive creation of multiple body plans in a single event. Slightly more sophisticated creationists attempt to claim that this was the act of creation for which the tales in Genesis are merely a metaphor, with each day of 'creation week' representing millions of years — a claim that collapses on realisation that, according to Genesis, green plants would have had to exist for millions of years with no sun to drive photosynthesis, since the sun is supposedly created the 'day' after plants.
This analysis pushes the origins of the Cambrian biota back into the Ediacaran, showing not a sudden spontaneous creation 540 million years ago, but the cumulative products of evolutionary diversification, probably beginning with these early multicellular organisms.
In addition to Professor Roger E. Summons of MIT, the team included Dr Lubna Shawar of Caltech, Gordon Love of the University of California, Riverside, Benjamin Uveges of Cornell University, Alex Zumberge of GeoMark Research in Houston, Paco Cárdenas of Uppsala University in Sweden, and José-Luis Giner of the State University of New York College of Environmental Science and Forestry.
