Yawns are more contagious among people with closer relationships.
163
The average person walks the equivalent of twice around the world in a lifetime
69
Nearly 10% of American households dress their pets in Halloween costumes.
36
Yu Youzhen, a Chinese millionaire, works as a street sweeper for the sanitation department to set an example for her children.
11
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Americans throw out 4.5 pounds of trash a day - twice that of 40 years ago.
76
