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Did surface life evolve on Mars?
The planet Mars has long drawn interest from scientists and non-scientists as a possible place to search for evidence of life beyond Earth because the surface contains numerous familiar features such as dried river channels and dried lake beds that hint at a warmer, wetter, more earthlike climate in the past.
How did life arise on Earth?
Earth is estimated to be about 4.5 billion years old, and for much of that history it has been home to life in one weird form or another.
Children spend half the time playing outside as their parents did
Children today spend half the time their parents did playing outside, a survey suggested.

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