Science
How many teeth do dogs have?
April 1, 2012
Author: onurates
Human
How many GPS satellites are there in the orbit?
April 1, 2012
Health
How many paper sheets can one tree produce?
April 1, 2012
Human
How many hours of sunlight to see in a day of Alaska?
April 1, 2012
Human
How many people use Skype in the world?
April 1, 2012