If you could invent something that would make life easier for people, what would it be?
Why is air a poor conductor of heat?
Why is each snowflake unique?
What is the threshold between safety and risk for exploration?
What would happen if all the trees in the world disappeared?
What do you think would be most exciting about living underwater?
Why do we have two sets of teeth – milk and permanent?
How can learning about other cultures help our society?
Is there ever such a thing as a safe tan?
What is time?