Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Billions of neutrinos pass unnoticed through your body every second.
6