In the 50's people used to laugh an average of 18 minutes per day. Today, that's down to 4-6 minutes a day.
Male dolphin assert their authority by raping other males.
There's a dissociative phenomenon called derealization that causes the external world to feel unreal or dreamlike. 74% of the population have experienced it.
By the time we die, most of us will have spent a quarter of a century asleep, of which six years or more will have been spent dreaming - and almost of all those dreams are forgotten upon waking.
After a man in England died of continuous laughter on watching an episode of 1970's TV Show 'The Goodies', his widow sent a letter to its makers, thanking them for making his final moments so pleasant.