Yawns are more contagious among people with closer relationships.
163
The Basenji dog is the only dog that is not able to bark.
4
If you yelled for 8 years, 7 months and 6 days, you would have produced enough sound energy to heat one cup of coffee.
1k
There is a family with a genetic condition that makes their skin blue, who have been isolated in rural Kentucky for generations.
34
Chanel Tapper, a student from California, USA, has the world's longest tongue, measuring 9.75 cm (3.8 inches), from tip to top lip!
26
The drummer for the rock group Def Leppard only has one arm.
156