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Hummingbirds are the hungriest birds in the world, burning through energy extremely fast. According to Nat Geo grantee Anusha Shankar, a human would have to eat 300 hamburgers just to match the equivalent of what hummingbirds consume to survive every day.

Read more video.nationalgeographic.com

lRRr TIL Ronald Wayne was a co-founder of Apple. He owned 10% of the company, but sold his stock for $800 on April 12, 1976 (today, worth nearly 60 billion). He later accepted $1,500 to forfeit any future claims against Apple.
kOWMW TIL John of Bohemia, after being blind for 10 years, died in the Battle of Crecy in 1346 when - at his command - his companions tied their horses' reins to his own and charged. He was slaughtered in the ensuing fight.
Y7VNd TIL one of Nazi physician Johanna Haarer's child-rearing strategies was that newborns should be placed in a separate room from their mother for the first three months of the baby's life, with only strictly regulated breastfeeding visits from her of no longer than 20 minutes during that period.
d9D7 TIL that many laundry detergents use chemical trickery to make clothes appear whiter. They contain agents called optical brighteners that glow blue under florescent and incandescent light, making clothes appear whiter than they actually are. Incidentally, this trick does not work under LED lights.
e0wd4 TIL James Watt needed to convince skeptics to ditch their draft horses&buy his steam engine. To prove its superiority, he measured a horse walking in ­circles to turn a grindstone in a mill. He multiplied distance it walked by its ­~180 pounds of pulling force&came up with a new measure: horsepower