› added 4 months ago

106

TIL that while rare, your blood type can change.

Read more ourbloodinstitute.org

via reddit.com

RD6a TIL that Russian Jewish engineer Jakow Trachtenberg developed a system of rapid mental calculation (The Trachtenberg system) while being held in a Nazi concentration camp in order to keep his mind occupied.
OGolY TIL that photoelectric cells (which effect explained by Einstein) switched the lights on during the exposition of Chicago from 1833. They were activated from photons coming from Acturus star ; those took 40 years to land there and were released from the star during the previous exposition
LkJXP TIL the oldest tree ever discovered was cut down by a scientist and a park ranger in order to retrieve a $50 scientific tool
X0XE8 TIL Most Canadian mortgages on homes are 5 years. Their amortization is 30 years. Mortgages themselves are 5 years and then you need to refinance. If rates have gone higher you are financing into higher monthly payments. Yikes!
9ZxD TIL Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.