1.8 million years ago
The Ethiopian highlands began to rise about 75 million years ago.
For modern homo sapiens - about 200,000 years ago for physical identity to us, mentally modern about 70,000 years ago. Obvious ancestors about 2 million years ago. Non ape ancestors about 5 million years ago, Primates about 60 million years ago. Earliest mammals about 200 million years ago. Etc.
The Paleozoic Era was about 2.5 times longer than the Mesozoic Era. The Paleozoic Era lasted from about 541 million years ago to 252 million years ago, while the Mesozoic Era lasted from about 252 million years ago to 66 million years ago.
The answer is 63.2 million years. Since the Tertiary Period began 65 million years ago and then stoped 1.8 million years ago you have to subtract the 1.8 million from 65 million to get the actual lenght of time.
The oldest known rocks, no bigger than sand grains, have been dated to 4,400 million years ago.
dinosaurs roamed the earth about 65 million years ago.
270 million years ago
65 million years ago
there was animal life 4.8 million years ago
They lived from 2.0 million years ago to 1.2 million years ago.
The Mesozoic Period (251 - 65 million years ago) lasted approximately 216 million years. It consisted of the Triassic Period (251 - 200 million years ago), the Jurassic Period (199-146 million years ago) and the Cretaceous Period (145 - 65 million years ago).
450 million years ago
4.567 million years ago
Around fifty million years ago.
144 to 65 Million Years Ago
The Cretaceous period occurred approximately 145 to 66 million years ago.
The pterosaurs flew during a time period staring about 220 million years ago and ending 65 million years ago.