Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: All cells have the small size in common.

A: What do all cells have in common?
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Q: Light is scattered from molecules in our atmosphere.

A: Light is scattered from what in our atmosphere?
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Q: Neutron stars are the corpses of left over supernova explosions.

A:
Neutron stars are the corpses of left over what?
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