There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
The human brain doesn't stop developing until about 25 years old.
102
More people in Africa speak French than in France itself.
12
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19