The Human Body

“A baby is born without kneecaps. They appear between age 2 and 6.”

— Jenny Kellett, amazon.ca

“You have no sense of smell when you're sleeping.”

— Jenny Kellett, amazon.ca

“Everyone has a completely unique smell (except for twins, who smell the same)”

— Jenny Kellett, amazon.ca

“Right-handed people live, on average, nine years longer than left-handed people do.”

— Jenny Kellett, amazon.ca

“Humans are the only animals to produce emotional tears.”

— Jenny Kellett, amazon.ca

“Your ears secrete more earwax when you are afraid than when you aren’t.”

— Jenny Kellett, amazon.ca

“In one day, your blood travels 12,000 miles around your body. That's four times the distance across the US from coast-to-coast.”

— Jenny Kellett, amazon.ca

“Three hundred million cells die in the human body every minute.”

— Jenny Kellett, amazon.ca

“Humans shed and regrow outer skin cells about every 27 days.”

— Jenny Kellett, amazon.ca

“You use 200 muscles to take one step.”

— Jenny Kellett, amazon.ca

“Babies are born with 300 bones, but by adulthood the number is reduced to 206.”

— Jenny Kellett, amazon.ca

“A human head remains conscious for about 15 to 20 seconds after it is been decapitated.”

— Jenny Kellett, amazon.ca

“Your eyes are always the same size from birth but your nose and ears never stop growing.”

— Jenny Kellett, amazon.ca

“By the age of 60, most people will have lost about half their taste buds.”

— Jenny Kellett, amazon.ca

“After eating too much, your hearing is less sharp.”

— Jenny Kellett, amazon.ca

“Sneezes regularly exceed 100 mph.”

— Jenny Kellett, amazon.ca

“Your left lung is smaller than your right lung to make room for your heart.”

— Jenny Kellett, amazon.ca

“The acid in your stomach is strong enough to dissolve razorblades.”

— Jenny Kellett, amazon.ca

“For every pound of fat or muscle gained, your body creates seven miles of new blood vessels.”

— Jenny Kellett, amazon.ca

“If the human brain were a computer, it could perform 38 thousand-trillion operations per second. The world's most powerful supercomputer, BlueGene, can manage only .002% of that.”

— Jenny Kellett, amazon.ca