› added 2 years ago

174

TIL there's a medical condition that causes its sufferers to sweat blood.

Read more ncbi.nlm.nih.gov

via reddit.com

p8gLZ TIL that the earliest credible evidence of coffee-drinking or knowledge of the coffee tree appears in the middle of the 15th century and none before that.
gr7A8 TIL Diet Coke was only invented in 1982.
XERrP TIL that most laundry detergents are blue because the dye cancels out "yellowing".
GApnQ TIL the white-throated needletail (Hirundapus caudacutus) it is believed that it can reach speeds of 160-170 kilometers per hour.
016y TIL that the dots in microwave oven doors are to keep radiation from escaping. This is accomplished because the dots are smaller than the wavelength of the radiation in question, creating essentially a faraday cage.