The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
A ball of glass will bounce higher than a ball made of rubber.
73
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The earth is approx. 6,588,000,000,000,000,000 tons.
175
The smell of freshly cut grass is actually a plant distress call.
31
Scientists aren't sure what color dinosaurs were.
312
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16