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
40% of people who are rejected in romantic love slip into clinical depression.
72
Historically, sweat has been an active ingredient in perfume and love potions.
309
Couples' personalities converge over time to make partners more and more similar.
235
One in five long-term love relationships began with one or both partners being involved with others.
177
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104