Pangaea was around and all the continents were connected. It was really cool.
The length of a day 500 million years ago was about 21 hours.
it looked like a flat landform with water all over it
At the bottom of the planet it was one large landmass that was breaking apart
aquatic
If They Lived 500 years ago It WAS 500 years ago
America was not here 500 years ago. It's only 236 years old (since 2012).
60 million years ago Canada was a mass of ice.
Trilobites lived in the Palaeozoic era, between 300 and 500 million years ago.
Pterodactylus fossils date to between 150.8 and 148.5 million years ago. Thus, they existed for about 2.3 million years.
The main groups of spider developed about 200 million years ago, in the Triassic period. Spider-like arachnids are known from towards 400 million years ago, and some true spiders are known from about 300 million years ago in the Carboniferous period. The spiders are part of the Arthropod family, which dates back to the Cambrian era, 500 - 600 million years ago.
16 million years ago approximately
1.8 million years ago