Cows can sleep standing up, but they can only dream lying down.
745
Men are more attracted to women whose bone structure is similar to their own mothers. It's called "sexual imprinting".
18
There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
You can reschedule your sleeping pattern by not eating 12-16 hours before you want to be awake. Upon eating after this time period, your internal clock will reset to a new day, with the time of your first meal being interpreted as "morning".
11
If Earth's history was condensed into twenty-four hours, life would've appeared at around 4am, land plants at 10:24pm, dinosaur extinction at 11:41pm, and human history would’ve began at 11:58:43pm.
21
Peanut butter and jelly sandwiches were originally considered a delicacy, only enjoyed by those of the upper class.
9