Mammals lived on earth for how many years?

Answer 1

Around 70 million years, near the end of the age of the dinosaurs. There are fossils of marsupials 125 million years old, and therapsids (mammal-like reptiles) existed in the Triassic, 200 million years ago.

Answer 2

"Since God made the earth. which would be over 7,000 years"

Go back to The Bible....

Anyway on a realistic note....quick search on Google:

"The massive gene study suggests that modern orders of mammals first evolved when the continents were separating during the Cretaceous era about 100 million years ago--much earlier than some previous estimates based on fossil studies, which link the evolutionary event to mass extinctions 65 million years ago"

Answer 3

Synapsids, which would evolve into mammals, separated from other amniotes about 300 mya (million years ago). True mammals, however, did not begin to appear until between about 250 and 200 mya. Most of the modern mammal orders that we see today did not appear until between 60 and 30 mya.

Answer 4

Mammals have been on Earth for the past 200 million years. They evolved after reptiles and before birds.

Answer 5

In the Cenozoic Era, sometimes known as 'Age of Mammals'

About 65 million years ago.

Answer 6

Day six of creation. Same as you and me.