The word 'hello' first appeared in writing in 1826, but wasn’t used as a greeting until 1877 - when it became the standard way to answer the telephone.

Forrest Mars, the creator of Peanut M&M's, was allergic to peanuts. Despite inventing one of the world’s most popular nutty snacks, he couldn’t eat them himself.

An Oxford study found that music can alter how wine tastes by blending sound with flavour. High-pitched tunes enhance sweetness, deep brassy ones bring out bitterness, and ambient music can make cheap wine feel premium.

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.