Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
4.5 pounds of sunlight strike the Earth each day.
27
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The only letter not appearing on the Periodic Table is the letter "J".
180
One ragweed plant can release as many as one billion grains of pollen!
51