It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
When dragonflies mate, their tails form a love heart.
22
Couples' personalities converge over time to make partners more and more similar.
235
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
99
In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
16