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47

TIL: Umwelt, or the self-centered world of different organisms

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pYZ4 TIL that after examining deforested areas of the Amazon rainforest, archaeologists discovered that ancient Amazon Indians had carved massive, flawlessly designed geometric shapes into the ground. They are several hundred yards in diameter.
64jZ TIL after X-raying a prayer book from the 13th century scientists discovered the pages had readable traces of an unknown work by Archimedes. The remarkable work book contained treatises on infinity written 2,000 years before anyone else thought up the concept.
Nyeb TIL Antimatter, at $62.5 trillion per gram, is the most expensive substance in the world.
LQdA9 TIL of "menu anxiety" which is defined as distress caused when ordering a meal at a restaurant. A survey showed that over 30% of Americans experience it. Of those who do, some try to avoid it by obsessively reviewing the menu online before showing up to the restaurant.
gMPYb TIL If anyone in a bonobo group, male or female, is feeling stressed, anxious, or irritated, someone will run over and give them a ‘bonobo handshake’ also known as social sexual contact.