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Still Waters

Animal embryos evolved before animals

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Still Waters

Animals evolved from single-celled ancestors, before diversifying into 30 or 40 distinct anatomical designs. When and how animal ancestors made the transition from single-celled microbes to complex multicellular organisms has been the focus of intense debate.

Until now, this question could only be addressed by studying living animals and their relatives, but now the research team has found evidence that a key step in this major evolutionary transition occurred long before complex animals appear in the fossil record, in the fossilised embryos that resemble multicellular stages in the life cycle of single-celled relatives of animals.

The team discovered the fossils named Caveasphaera in 609 million-year old rocks in the Guizhou Province of South China. Individual Caveasphaera fossils are only about half a millimeter in diameter, but X-ray microscopy revealed that they were preserved all the way down to their component cells.

https://phys.org/news/2019-11-animal-embryos-evolved-animals.html

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Not A Rockstar

SOooo then, the answer to the age old question of "which came first, the chicken or the egg", the answer is the egg, right? :)

 

I'll get my coat.

 

lol.

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