Apple seeds, cherry apricots, and peach pits contain cyanide, but it takes a large amount of each to make you sick or kill you.
100 Mind-Blowing Pits Facts
People have been tracking time for thousands of years. In 2013, archaeologists found what’s thought to be the world’s oldest lunar calendar while excavating a field in Scotland. The calendar, which is made of a series of 12 pits that mimic the moon’s phases, dates back to around 8000 BCE.