- Roosters can't crow if they can't fully extend their necks.
- More than 75% of all countries are north of the equator.
- There are over 97,000 km (60,000 miles) of blood vessels in the average person.
- Only female mosquitoes bite.
- You can only see a rainbow if you have your back to the sun.
- Your mouth produces 1 litre of saliva a day.
- Queen termites can live up to 50 years.
- 85% of plant life is found in the ocean.
- Check out some more big numbers.
- Bull's can run faster uphill than down.
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