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During the last Ice Age, there were many large, interesting mammals, like the saber-toothed cats, giant ground sloths, mastodons, and mammoths. These animals have long since gone extinct and are known mostly from fossils, from frozen, mummified carcasses, and even from ancient cave drawings.

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13y ago
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14y ago

Prohesperocyon Wilsoni is the oldest known fossil that clearly belongs to the family Canidae (dog family). It lived about 40 million years ago.

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10y ago

they were tiny, about the size of mice
Rat sized .

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Q: What were the first mammals like?
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What did the first mammals look like?

Little rodents.


When did mammals first appear on earth by paleontologists?

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


What did the first mammals in the fossil record look like?

Tiny, shrew or mouse-like creatures.


What kind of mammals were on earth during dinosaur ages?

During the end of the Triassic period, the first mammals evolved from therapsids, or mammal like reptiles. Some of these mammals were the Purgatorius, a tiny rodent like creature, and the Castorocauda, which had beaver like characteristics.


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Dinosaurs first appeared shortly before mammals did.


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When was the first appearance of land mammals?

The first appearance of land mammals occurred in the late Triassic period.


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What is an example of a Marine life food chain?

EXAMPLE: Phytoplanton-->Zooplankton-->Small Fish-->Bigger Fish-->Mammals If confussed about mammals, here is another example.. stuck on mammals, think of like biiiiiig fish like WHALES! Those are mammals... EXAMPLE: Phytoplanton-->Zooplankton-->Small Fish-->Bigger Fish-->Mammals If confussed about mammals, here is another example.. stuck on mammals, think of like biiiiiig fish like WHALES! Those are mammals...