Web Results

en.wikipedia.org/wiki/Timeline_of_evolutionary_history_of_life

This timeline of the evolutionary history of life represents the current scientific theory outlining the major events during the development of life on planet Earth. In biology, evolution is any change across successive generations in the heritable characteristics of biological populations.

www.reference.com/history/did-first-land-animals-appear...

When Did the First Land Animals Appear on Earth? According to Earth System Science Education, the first land animals appeared toward the middle of the Paleozoic Era, in the late Silurian period. The earliest animals to adapt to the land were small arthropods similar to mites, spiders and scorpions.

explorecuriocity.org/Explore/ArticleId/166/who-were-the-very-first...

So there we have it - the first animal on earth was a marine organism. It was not until 240 million years later that the first animal showed up on land. This was a four-legged amphibian called Ichthyostega, which is a Greek term meaning "fish roof". Learn More . Canadian Fossil Discovery Centre — Fossilization

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

The first fish-like animals to squirm out of the sea and onto land were pretty wild looking, new research concludes. Cartoon depictions of the first animals to emerge from the ocean and walk on ...

www.newscientist.com/article/dn17453-timeline-the...

Timeline: The evolution of life. ... in what may have been the first “snowball Earth”, ... that animals were exploring the land at this time. The first animals to do so were probably ...

www.wisegeek.com/what-were-the-first-animals-to-walk-on...

The question asked is "What were the first animals to walk on land" --- not "What were the first fully terrestrial animals to walk on land." Thus, an animal that walks on land only part of its time and whose ability to breathe air is undetermined still qualifies, and the first such animals to do this were euthycarcinoids and giant slug-like animals.

www.youtube.com/watch?v=SjNQUOYtZC0

More than 420 million years ago ancient millipedes took their first many -- many many many -- steps onto land. Today they remain largely cryptic animals, as there are tens of thousands of species ...

en.wikipedia.org/wiki/Evolutionary_history_of_life

The evolutionary history of life on Earth traces the processes by which living and fossil organisms evolved, from the earliest emergence of life to the present. Earth formed about 4.5 billion years (Ga) ago and evidence suggests life emerged prior to 3.7 Ga. (Although there is some evidence of life as early as 4.1 to 4.28 Ga, it remains controversial due to the possible non-biological fomation ...

www.livescience.com/4880-shock-animal-earth-surprisingly...

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 imagine the earliest critter could be so complex.

www.scientificamerican.com/article/first-life-on-land

First Life on Land? ... Tortotubus helped set the stage for complex land plants and later animals by triggering the process of rot and soil formation. ... as life on land transformed from simple ...