Yawns are more contagious among people with closer relationships.
163
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
8
The first webcam was used in 1991 by Cambridge researchers for checking the coffee pot without leaving their desks.
10
In Cuba, hitchhiking is encouraged and government vehicles are legally required to pick up hitchhikers.
4