› added 6 months ago

26

TIL that the bumps on humpback whales are giant sensory hair follicles, and that the purpose of the hairs is still unclear

Read more earthtouchnews.com

via reddit.com

NERN TIL Superman II was filmed simultaneously along with the original in 1977. Due to cost overruns and dysfunction on the set, filming on the sequel was halted only 75% completed, and the ending to Superman I changed. The filmmakers decided that if Superman I was a hit, they’d finish Superman II.
dDwnZ TIL Aral Sea is a place of dark tourism where several ghost towns and ship graveyard dot its former shorelines after it dried up. After reaching the former port of Moynaq in Uzbekistan, it takes a 4WD car several hours to reach remains of the sea
WkN49 TIL that sleep literally cleans your brain. During slumber, more cerebrospinal fluid flushes through the brain to wash away harmful proteins and toxins that build up during the day.
R76E4 TIL: During WWII, armies deployed Searchlight Units to aide night time movement, detect enemies and dazzle enemies. They were called "Moonlight Batteries". On cloudy nights, the units could bounce the light off clouds to provide diffuse lighting.
Oo894 TIL the much of the NYC subway system's control signals are still based on hundred year old technology. When parts fail, they must be scavenged from scrapped parts or custom made at great expense.