There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
40% of people who are rejected in romantic love slip into clinical depression.
72
There are about 255 babies born worldwide every minute.
46
Yawns are more contagious among people with closer relationships.
163
People who have a strong friendship possess the ability to communicate with one another through facial expressions.
46
Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
119