Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Cold water weighs more than hot water.
93
A ball of glass will bounce higher than a ball made of rubber.
73
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16