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188

TiL about the "Sweet Track" a causeway built by a Neolithic community in 3807 B.C.

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wLLGo TIL carrots are orange for political reasons. In the 17th century, Dutch growers cultivated orange carrots as a tribute to William of Orange. Before this, they were mostly yellow, white or purple.
rWw4 TIL that the co-founder of Paypal, Max Levchin, coded non-stop for 5 days without sleep and then finished the product 1 hour before he received $4.5 million in funding
nolr TIL that the biggest scale infiltration of the US government was done by Scientologists to destroy all negative evidence of their creator L. Ron Hubbard. Even with successful prosecution, they are still considered a valid religion and not a terrorist organization.
wLEdE TIL some marathon runners elect to have their toenails permanently removed. Their level of running causes friction on the toes and results in toenails routinely becoming damaged and detached. To circumvent chronic nail wounds, some people just get rid of them entirely.
9Y7VG TIL Zebrafish can produce their own sunscreen, a chemical called gadusol which protects the fish against harmful UV radiation. Scientists are also now learning that many species of vertebrates, mammals excluded, produce gadusol. Zebrafish can also regenerate their hearts during their larval stages.