The country of Niger has the highest birth rate in the world, with 7 children born per woman. Nadya Suleman, aka Octomom, had the most kids in one birth to survive. Her octuplets, six boys and two girls, were born in 2009. In Japan, it's common to see an unsupervised six year old taking the subway to run errands or get somewhere. It was once believed you could cure common childhood illnesses like croup or cold with kerosene and turpentine. The longest pregnancy ever recorded was a whopping 12.5 months! The baby born wasn't a small giant, but just 6 pounds, 15 ounces. In some European countries, it's common practice to let little kids stay up until 10 p.m. -- which might just ruin your night.