Iron weighs more after it rusts.
68
German chemists made a replica of a trophy the size of one molecule.
68
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
A ball of glass will bounce higher than a ball made of rubber.
73
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65