A very long time ago.
According to the bible, the first person to walk on earth was Adam, followed by Eve.
250 b.c. .
Many mammals walk the same day as born.
yes and walk on two feet
Adam and eve
Adam from Bible
Adam then Eve
Adam and Eve.
they was not for they were the first humans to walk the earth
Mammals first appear in the fossil record of the Mesozoic Era.
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.
The answer to this question is fish as fishes were the first invertbrates to evolve.