npr.org

Egvd0 TIL The original Jungle Gym was originally designed to help children comprehend the 4th dimension as a tesseract by an eccentric British mathematician.
4klOb TIL less than 10% of all plastic has ever actually been recycled
8eYEV TIL during the 2010 eruption of Iceland's Eyjafjallajökull (which resulted in the several day closure of European airspace) one of the only European airports to remain open was Iceland's Keflavík International Airport.