https://www.livescience.com/5529-land-creatures-wild-appearances.html

Jul 6, 2009 ... The first fish-like animals to squirm out of the sea and onto land were ... the Earth, the first four-legged creatures made their first steps onto land, ...

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 ... was not until 240 million years later that the first animal showed up on land.

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”, .... Fossil evidence shows that animals were exploring the land at this time.

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. ...... The oldest fossils of footprints ever found on land hint that animals may have beaten plants out of the primordial seas .

https://sci.waikato.ac.nz/evolution/AnimalEvolution.shtml

DNA evidence suggests that the first eukaryotes evolved from prokaryotes, between ... around the world, this particular group of animals is generally known as the .... These early land animals had to solve the same problems that plants faced ...

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://blogs.scientificamerican.com/science-sushi/evolution-out-of-the-sea/

Jul 28, 2012 ... It wasn't until a billion years later that the first life was brought forth, filling the ... that centipede-like animals began to explore the world above water. ... ago, plants and colonized the bare earth, creating a land rich in food and ...

https://www.khanacademy.org/science/biology/history-of-life-on-earth/the-diversification-of-life/v/first-living-things-on-land-clarification

First living things on land clarification (This video copyrighted under Create ... did the plants move out of the sea only to provide food fore the animals on the land? ... formation of the ozone layer, which protects earth from extreme UV radiation.

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.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 ...