Amazing facts

• Want to try your hand at some paper folding?A dry sheet of paper cannot be folded in half more than 7 times
• A single bolt of lightning can heat up the atmosphere to 50,000 degrees Fahrenheit
• A compass never points to the geographic north but to the magnetic north
• Ancient science? In the 2nd Century B.C Greek astronomer Erstosthenes accurately measured the distance around the earth at about 40,000 km but nobody believed him
• You do know that light travels faster than sound.But did you know that sound travels 3 times faster through water than through air?