1. Lovers’ heartbeats synchronise when they stare into each other’s eyes.
Scientists got 32 couples to sit and face each other for three minutes (not all at the same time, we presume). After the time was up, the heart rates of the couples were in sync. They didn’t sync for people not involved in romantic relationships.
13. This Californian sea lion can keep a beat.
She’s called Ronan and is the first nonhuman mammal to demonstrate this ability.