Paleontologists have discovered fossils of centipedes that are 414 million years old  These fossils are at least 20 million years older than the earliest land-dwelling animals previously identified
The paleontologists are confident that these centipedes lived on land, even though the fossilized centipedes were discovered in rock that also contained fossilized remains of animals known to be water-dwelling
Fossils of the earliest land-dwelling animals that had previously been identified were found in rock that did not contain fossilized remains of water-dwelling animals.