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TIL Lymphocytes kill targets including tumor cells by inducing them to undergo programmed cell death aka apoptosis.

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nePOB TIL that since 2013 starfishes in the Pacific Ocean have been going through a deadly plague/epidemic. The disease is called Sea Star Wasting Disease which seems to be associated with a virus. It causes the starfishes to tear their limbs apart and eventually leads to their deaths.
yQ1yl TIL The Shadow Kingdom, a 1929 short story by Robert E Howard, The creator of Conan, is the origin of the Reptillian Conspiracy Theroy.
la9N TIL in the 1941 Battle of Raseiniai, a single Russian KV tank stopped an entire German Division for a full day until it finally ran out of ammunition
YeAG TIL a whistled language, 100’s of years old, is spoken by inhabitants of La Gomera in the Canary Islands used communicate in ravines and valleys up to 5 kilometers away.
VBX5B TIL Socrates wrote nothing. All that is known about him has been inferred from accounts by members of his circle—primarily Plato and Xenophon—as well as by Plato's student Aristotle, who acquired his knowledge of Socrates through his teacher.