The length of a day 500 million years ago was about 21 hours.
The Cretaceous Period ended about 66 million years ago.
The Devonian period lasted for approximately 60 million years, from about 419 million years ago to 359 million years ago.
1-1.8 million years ago was approximately 0.2-0.8 million years ago.
Coral reefs have existed for over 500 million years, with modern reef-building corals appearing around 240 million years ago. They have evolved and adapted to various environmental conditions over time, becoming vital ecosystems for marine biodiversity.
Pangaea lasted for around 100 million years, from around 335 million years ago to 175 million years ago.
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.
500 years ago
5,510 years
About 500 to 600 years ago
It lasted 64 million years.
aquatic
The Carboniferous is considered to have started 354 million years ago and ended 290 million years ago.
The Cretaceous Period ended about 66 million years ago.
From about 65 million years ago to about 265 million years ago I think. In any case, a long time ago.
65 million years ago
Dinosaurs have dominated earth for 150 million years ago. This is the reason why they are so successful.