- 1 gigayear = 1,000,000,000,000 years.
- Your head contains 22 bones.
- Fingernails grow faster than toenails.
- The odds of being struck by lightning are one in 15,300 in your lifetime.
- Birds need gravity to swallow.
- The worlds smallest bird is the 'bee hummingbird' found in Cuba.
- A tsunami can travel as fast as a jet plane.
- There are more stars in the sky than grains of sand on earth.
- The hydrochloric acid found in your stomach is strong enough to dissolve a nail.
- There are more insects in the world than all other animals combined.
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