By weight, Bone is five times stronger than steel.
417
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Babies crawl an average of 200m a day.
212
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Two in five people in the world marry their first love.
270
Each day, there are over 120 million sexual intercourse taking place all over the world.
301
On average, someone in the US suffers a stroke every 40 seconds; someone dies every 3 minutes from stroke.
57
40% of people who are rejected in romantic love slip into clinical depression.
72