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A very long time ago.

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13y ago
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Q: When did the first mammals walk the earth?
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Related questions

Who was the first to walk on earth before Jesus?

According to the bible, the first person to walk on earth was Adam, followed by Eve.


How old was the earth when the first mammals appeared?

250 b.c. .


Can mammals walk until one years old?

Many mammals walk the same day as born.


Do mammals crawl?

yes and walk on two feet


First man to walk the earth?

Adam from Bible


Who were the first people to walk the earth?

Adam and eve


Who was the first people to walk the earth?

Adam and Eve.


Who is the first people to walk the earth?

Adam then Eve


Where were Adam and Eve found?

they was not for they were the first humans to walk the earth


When did mammals first appear on earth by paleontologists?

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


Is it true that the first mammals appeared on Earth at about the same time as the first terrestrial plants?

No. The first land plants were on the planet 0.475 billion years ago. The first mammals were on the planet around 160 million years.


Which lived on earth longer mammals or dinosaurs?

Mammals.