› added 4 years ago

234

TIL that more than 100 tons of space dust falls to Earth every single day. They are tiny (50 µm to 2 mm) meteoroids that survived entry through the Earth's atmosphere. Some land on our rooftops as well and can be captured using a strong magnet placed in the rain gutter.

Read more popularmechanics.com

via reddit.com

l0KN TIL Simpsons producer Al Jean has stated his plan for the show’s final episode would involve the arrival of the Christmas pageant in the first episode, making the entire series a continuous loop
VL64 TIL that there are large numbers of abandoned highways in the US. They are typically left in place and known as lost highways.
DQ4yD TIL that the modern doorknob was invented in 1878 by 16 year old African American inventor Osbourn Dorsey
jrvX TIL The Mongol Conquests in the 13th and 14th centuries killed over 17% of the world population, far more than any other conflict or conquest in human history
Me5KA TIL that US submarine torpedos in WW II often failed to detonate due to faulty design of their firing pins. To correct the problem, Pearl Harbor workshops designed and mass produced new firing pins from the propeller blades of Japanese aircraft downed in the December 7, 1941 attack on Pearl Harbor.