By a million years ago, early hominids — our human ancestors — were walking upright and making tools. They were on the move. Our ancestors originated in Africa between one and two million years ago and eventually moved to Asia and Europe. Scientists speculate that climate change had a lot to do with their migration.
If you had observed Earth from space a million years ago, the alignment of the continents would have looked very much like it does today. The lower sea level would have exposed land bridges between continents, allowing freer migration for our ancestors as well as animals and plants.
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Answer:
By a million years ago, early hominids — our human ancestors — were walking upright and making tools. They were on the move. Our ancestors originated in Africa between one and two million years ago and eventually moved to Asia and Europe. Scientists speculate that climate change had a lot to do with their migration.
Answer:
If you had observed Earth from space a million years ago, the alignment of the continents would have looked very much like it does today. The lower sea level would have exposed land bridges between continents, allowing freer migration for our ancestors as well as animals and plants.