All this means that in the 200,000 years since Homo Sapiens took her first steps across the African plains, just 57 billion people have ever lived. Astonishingly that means over 12% of all the people ever born are walking the planet at this very moment. Or to put it another way: one in eight people who have ever been born are alive today.

Research suggests that one additional Wal-Mart Supercenter per 100,000 residents increases individuals' probability of being obese by 2.3 percentage points, say Charles Courtemanche of the University of North Carolina and Art Carden of Rhodes College.

IfItWereMyHome.com is your gateway to understanding life outside your home. Use our country comparison tool to compare living conditions in your own country to those of another. Start by selecting a region to compare on the map to the right, and begin your exploration.

The obvious answer was to look at planes that returned from missions, count up all the bullet holes in various places, and then put extra armor in the areas that attracted the most fire.

Obvious but wrong.

Stats for lessn