Most people smile when they are frustrated, according to a study.
15
In 2005, 25 percent of Americans over the age of 50 played video games, an increase from nine percent in 1999.
82
The offspring of two sets of identical twins are legally cousins but genetically siblings.
63
The “cheerleader effect”, the theory that girls look more attractive in groups, is scientifically proven.
8
Only 2% of the Earth's population are natural redheads.
13
Studies suggest that people who appear to be constantly distracted have more "working memory" and "sharper brains".
13