/u/02grimreaper's posts in /r/askscience
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What elements make up dirt/sand? Is it a bunch of different elements? Is that why there is so much of it?
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If the Hubble telescope was sent up in 1990, almost thirty years ago, and which the technology we have learned in that time, how come we haven’t sent up a new Hubble telescope?
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How much do hand dryers at restaurants actually help the environment, considering they still use electricity, compared to using hand towels?
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How much more viable is electric vehicles than gas vehicles, considering a lot of electrical companies use coal/gas/oil to produce their electricity?
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