› added 5 years ago

547

TIL that there's a rare blood group called P-null. It is based on the presence of any of three substances known as the P, P1, and Pk antigens on the surfaces of red blood cells.

Read more britannica.com

via reddit.com

b9Kn4 TIL that a large alliance of Native American tribes, the Timucua, consisted of over 200,000 people spread across 35 chiefdoms. They were probably the first Natives Ponce de Leon met in Florida. The nation was wiped out before 1800 and all evidence of religious items and art were burned by explorers.
7rE9L TIL that people with schizophrenia have DMT (a powerful psychedelic compound) in their urine. This study found that 47% of schizophrenics, 38% of people with psychosis, and 19% of people with personality disorders had detectable amounts of DMT in their urine.
ZpY6v TIL Louis Braille faced resistance towards and doubts about his writing system for the blind, called Braille. His school burned books he and his classmates had transcribed into Braille, since the school thought that the effectiveness of Braille was a threat to their revenue.
yQBnl TIL about Caño Cristales which is often called “the river of five colours” or the “liquid rainbow”, and according to local legend, it escaped paradise to flow through the Earth.
ADNYg TIL When the new United States capital was founded in 1791, the landmarks of the city were renamed in honor of Rome. Goose Creek became Tiber Creek, Jenkins Hill became Capitol Hill, and the Congress was the Capitol itself, recalling Rome’s Temple of Jupiter Optimus Maximus.