What is the biological advantage of crying when emotional?
Tearful emotional crying is a uniquely human ability, but why do we do it?
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How do food packaging companies decide how tight to make the lids on jars? Has this increased over time or am I just getting older? (continued)
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This week鈥檚 new questions
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Why do I always sneeze twice?
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Can you get triple or quadruple rainbows?
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Why hasn鈥檛 evolution given us eyes in the back of our head (continued)?
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This week鈥檚 new questions
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Do any species of bird hiccup? If so, why would they do this?
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How much of the movement of clouds is due to Earth鈥檚 rotation?
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Why do duvet covers swallow other laundry? (continued)
More answers to: When you wash a duvet cover, why does other washing end up in it?
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This week鈥檚 new questions
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Are birds that walk more advanced than those that hop?
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Do the different causes of headaches create pain in different places?
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Are tandems really more efficient than regular bikes (continued)?
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