Astronauts cannot burp in space because the lack of gravity prevents food and gas from separating in the stomach as they do on Earth. Their diet is carefully designed to avoid foods that produce excess gas.

Tigers have striped skin, not just striped fur.

A 2015 study found Facebook Likes let algorithms predict your personality better than those closest to you - 10 Likes outpace a colleague, 150 beat your family, and with 300 likes the algorithm knows you better than your spouse.

Pinecones can be used to indicate when it's going to rain, as their scales open in response to increased humidity, often signaling rain within a few hours.

About 10% of Caucasians, 50% of Hispanics, and over 90% of Asians and Africans are born with a bluish birthmark called a Mongolian spot, which is typically found on the buttocks.

Multiple studies have found that people wearing red or black T-shirts are perceived as more attractive. These colours are associated with power, confidence, and dominance, which enhance their appeal.

In 1999, a chimpanzee named Raven became the 22nd most successful money manager in the USA by selecting stocks with darts, outperforming over 6,000 professional brokers.