/u/Pompi_Palawori's posts in /r/askscience
The more I think about it, the weirder it is that people laugh when tickled. Why do we do that? How does our body tell the difference between normal light touching and tickling? Why is the laughing involuntary?
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If plants first started appearing 500 million years ago, and mammals started appearing 210 million years ago, how come mammals are so much more intelligent than plants, even though plants had significantly more time to evolve?
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Is there a device that can take Carbon dioxide out of the atmosphere? If so, how come it is not widely known to the public, or used to help stop global warming?
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If devices that can capture Co2 from the atmosphere already exist, why aren't we using them to combat global warming?
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