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The 17 Happiest Science Facts Of All Time

These will make you feel warm inside.

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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.

9. Astronauts grew a rose in space just to see if it would smell different than a rose on Earth.

NASA/Marshall Space Flight Center

And it did! Volatile compounds that make a flower smell a certain way act differently in microgravity.

13. This Californian sea lion can keep a beat.

View this video on YouTube

She's called Ronan and is the first nonhuman mammal to demonstrate this ability.

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