ANSWERS
1) a
2) Rapid cooling and glaciation of the planet, followed by rapid warming.
3) c
4) d
5) A computer in Jordan Pollack's lab at Brandeis
6) Natural selection
7) Detect the gravitational wobble the planet causes in its parent star or detect the tiny decrease in light from the parent star as the planet crosses in front of it.
8) b
9) Language
10) Robots

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