https://www.bbvaopenmind.com/en/science/bioscience/what-were-the-first-animals-on-earth/

Nov 5, 2018 ... 575 million years ago, the Avalon explosion gave place to the emergence of the first animals over the surface of the Earth such as Dickinsonias ...

https://www.livescience.com/4880-shock-animal-earth-surprisingly-complex.html

Apr 9, 2008 ... Earth's first animal was the ocean-drifting comb jelly, not the simple sponge, according to a new find that has shocked scientists who didn't ...

https://www.nsf.gov/news/news_images.jsp?cntn_id=111408&org=NSF

The comb jelly could only have achieved its apparent seniority over the simpler sponge via one of two new evolutionary scenarios: 1) the comb jelly evolved its ...

https://en.wikipedia.org/wiki/Timeline_of_the_evolutionary_history_of_life

This timeline of the evolutionary history of life represents the current scientific theory outlining ... The first known mass extinction in earth's history was the Great Oxygenation Event 2.4 billion years ago. .... 580–500 Ma, Most modern phyla of animals begin to appear in the fossil record during the Cambrian explosion. 550 Ma ...

http://explorecuriocity.org/Explore/ArticleId/166/who-were-the-very-first-animals-to-set-foot-on-the-earth-166.aspx

Jan 23, 2012 ... But the first animals on earth actually appeared about 400 million years earlier than dinosaurs and they were discovered right here in Canada!

https://allthatsinteresting.com/first-animal-on-earth

Not only have MIT biologists discovered the very first animal on Earth, they've found that it existed 250 million years earlier than previously thought.

https://www.newscientist.com/article/dn17453-timeline-the-evolution-of-life/

Jul 14, 2009 ... Earth freezes over in what may have been the first “snowball Earth”, possibly as a ... The early multicellular animals undergo their first splits.

https://www.sciencemag.org/news/2018/11/some-earth-s-first-animals-including-mysterious-alien-looking-creature-are-spilling-out

Nov 20, 2018 ... New fossils and sites are helping make sense of the flowering of animal life half a billion years ago.

https://phys.org/news/2018-08-evolution-rethink-scientists-closer-earth.html

Aug 10, 2018 ... Evolution is getting a rethink after scientists take a closer look at Earth's first animals An Ediacaran fossil from the National Earth Science ...

https://www.independent.co.uk/news/science/first-animals-appear-earth-mystery-solved-scientists-snowball-bacteria-a7896641.html

Aug 16, 2017 ... New research has shed fresh light on how animals first appeared on the Earth. It is a story spanning hundreds of millions of years, of entire ...