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Video: How pain relievers work

This neat TEDEducation video explains how humans experience pain and how medicines such as aspirin or ibuprofen relieve pain. Enjoy (hopefully painlessly)!

Via Devour

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Sex biology redefined: Genes don’t indicate binary sexes

The scenario many of us learned in school is that two X chromosomes make someone female, and an X and a Y chromosome make someone male. These are simplistic ways of thinking about what is scientifically very complex.