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TIL many rock drawings of animals by native Americans have turned out to be complex regional maps, with the animals representing herd locations. They were both hunting guides and warning signs

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gM5k8 TIL that in 1998, Sony released a camcorder with night vision so powerful it could see through people's clothes. Sony immediately issued a recall.
1aWNX TIL that when you get a sunburn, it's not your skin cells being damaged by the sun's UV rays and dying, it's your skin cells' DNA being damaged by the sun's UV rays making the cells kill themselves to prevent turning into cancer
GDMQ TIL - Monty Python’s “Dead parrot sketch” has its roots in the oldest book of humor known: Philogelos, written in the 4th century…
7rVjx TIL scientists developed a kind of "inverted sieve", which holds back smaller particles, while letting bigger particles through.
K8ZE TIL that the atlas moth, which is considered the largest moth species in the world, can spend up to 5 years in it’s cocoon but after emerging into its moth form, only lasts for 3-5 days.