› added 1 year ago

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TIL Commercial drones and controllers emits its location unencrypted which is why police can easily locate them.

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via reddit.com

w9Eo TIL Humans have the ability to see ultraviolet (UV) light, but it is filtered by the eye’s lens. People who have surgery to remove the lens (typically because of cataracts) can see UV light.
v1xbK TIL in the past, Chinese writers would use pejorative symbols: such as dog and monkey radicals, to write the names of ethnic groups that the Chinese didn't like.
Yp7Md National Geographic grantee Erin Spencer dives into this week’s Today I Learned with one of the leading threats to biodiversity: the invasive lionfish.
YjrG TIL that Russian cosmonauts used to carry a handheld, triple barreled shotgun with a fold out machete into space to fight off bears and wolves when they landed.
xNpb TIL that one olive tree can produce around four liters of oil every year for hundreds of years.