biology
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Via neiltyson
Neil DeGrasse Tyson made a lot of people (and presumably ducks, cats and bedbugs) angry with a much less than true fact about sex and evolution. His claim, that sex doesn't hurt any species had many Twitter users jumping to correct him. 
via @RachelFeltman, @SciPhile, @ClaireConnelly, @carlzimmer, @DreadMorgan
And you might be thinking, he's just trying to be positive about human sexuality and say, in his own pseudoscientific way that it's healthy and painless for humans. But... that's actually not true either:
via @DebbyHerbenick, @mikamckinnon
Sure, he's a scientist but cut him some slack, he's not that kind of scientist. He studied astrophysics, how's he supposed to check his facts at all before Tweeting about biology?
via my-little-talks
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We've got some seriously bad news for fish-lovers. According to a report from nonprofit Oceana, over 20% of 449 fish that they tested were mislabeled, exposing some pretty serious "fish fraud." This is a staggering percentage, especially when considering that less than 1% of fish is tested for fraud. There's a huge chance that the expensive fish you're ordering while dining out is cheap - or even, according to this related Twitter thread from a biology professor, dangerous. There are fish out there that will hurt you to eat. And, as @AwesomeBioTA's class discovered, some of this "fish" is almost too disgusting for words.
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