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Answered 2011-10-23 10:17:34

millions of years ago

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When did mammals first appear on earth by paleontologists?

like i know

Where did the first mammals appear?

On earth........? you need some help?

In what era did mammals first appear?

Mammals first appear in the fossil record of the Mesozoic Era.

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What era did mammals first appear?


When did mammals appear on earth?

In the Cenozoic Era, sometimes known as 'Age of Mammals' About 65 million years ago.

What mammals appear on planet earth?

Many mammals appear on planet earth. Here are some of them:oxhumanpigmonkeycatdogfoxwolfantelopeelephantpolar bearhorse

In what period did the first mammal appear?

The Jurassic. Mammals evolved continuously from the early synapsids of the Paleozoic to modern mammals, but the first mammals that are considered "true" mammals appeared in the Jurassic.

When did the first mammals appear?

The first true mammals appeared during the late Triassic Period, about 200 million years ago.

What era was the age of the mammals?

The Cenozoic Era was when mammals first appeared on Earth!

During which period in the Mesozoic era did dinosaurs and the first mammals appear?

The first dinosaurs AND the first mammals both appeared in the Triassic period From the Mesozoic era.

When did mammals first appear?

200 m.y.a. (million years ago)

When did flying birds first appear on earth?

they were the first dinosaurs on earth we think

Did dinosaurs appear before mammals and how long before?

Yes they did. They appeared about 10 million years before the first mammals.

How old was the earth when the first mammals appeared?

250 b.c. .

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The first true mammals appeared on Earth around 200 million years ago, in the late Triassic period. However, these mammals would remain small and relatively insignificant due to the dominance of the dinosaurs. Only when they died out 65 million years ago did mammals grow and diversify to become the ones we see today. The first modern humans (Homo sapiens sapiens) evolved around 200,000 years ago.

What were the first reptiles to appear?

Dinosaurus were the first reptiles on earth.

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The first mammals appeared during the Cretaceous Period.

When did corals first appear on earth?

I think when earth was cover in water.

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the paleontogists believe that cathaymyrus was the first appear in the eon(on earth)

What were the first mammals on earth?

all mammals it says in the bible all living things were made on the 6th day