Do You Know?

1. Can ageing be controlled?
2. We talk of "ancient" artefacts. How do we know how old they really are?
3. We are told to brush our teeth every day. Do other animal species care for their teeth too?
4. Can I "melt" a potato into a liquid?
5. How did we get to using cows for our needs like milk, etc?
6. Is it true that we use only 10\% of our brains? What happens to the rest then?