1. Fingernails grow four times faster than toenails
2. Right handed people live, on average, nine years longer than left-handed people
3. If you
rub an onion on your foot – within 30 – 60 minutes you will be able to
taste it – this is because it travels through the blood stream
4. You can’t
kill yourself by holding your breath (if you hold it until you go
unconscious, you begin to breath normally as soon as you do)
5. On one square inch of human skin there are 20 million microscopic creatures
6. A snail can sleep for 3 – 4 years – during which period it does not need food
7. Giraffes can live longer without water than camels
8. The songs
of humpback whales can change dramatically from year to year, yet each
whale in an oceanwide population always sings the same song as the
others
9. To test if a pearl is real, you can rub vinegar on it – the composition of the pearl will cause it to bubble furiously
10. Oysters can change between being female or male
