› added 2 months ago

10

TIL that in pre-modern China, poor families adopted girls to make sure their sons will be able to marry in future while other poor families with unwanted girls gave away their daughters.

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d8obj TIL your brain is only 2% of your body mass but burns around 20% of your daily calories. The expensive-tissue hypothesis suggests increased complexity of the human brain has increased its energy requirements.
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