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Tertiary Period, Cenozoic
^^^LOL, wrong
they probably appeared about the same time as the dinosours: 250 million years ago
Umm.... first answer was right... Thanks a lot to NathanChooper for screwin that up
Ummm your alll long cause i made them appear when i wanted :) and ...nvm
ok, mayby they appeared during the early jurassic (200mya) but it was long before the cenozoic.
nathanchooper:1
some guy i'm arguing with: 0
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∙ 11y ago
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∙ 15y ago510 million years ago
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What mammals appear on planet earth?
Many mammals appear on planet earth. Here are some of them:oxhumanpigmonkeycatdogfoxwolfantelopeelephantpolar bearhorse
When did mammals first appear on earth by paleontologists?
Mammals first appear in the fossil record of the Mesozoic Era.
In general the first mammals of any group to appear in the fossil record?
resembled dogs and cats
How old was the earth when the first mammals appeared?
250 b.c. .
When did humans and mammals appear on earth?
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.
When did small furry animals appear?
The first mammals appeared during the Cretaceous Period.
Where did Arthropods first appear on earth?
yes
When did the first mammals walk the earth?
A very long time ago.
When did the first ladybug appear on earth?
Chick or the egg!
What were the first orgisms to appear on earth?
In someones pants??
What were the first creatures to appear on earth?
well the first thing was algae...and formed from there on
What was the first species to appear on earth?
The early bacterias. Hominids
