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Seven Things That Don’t Make Sense About Gravity
New Scientist: It’s the force we all know about and think we understand. It keeps our feet firmly on the ground and our world circling the sun.
Yet look a little closer, and the certainties start to float away, revealing gravity as the most puzzling and least understood of the four fundamental forces of nature.
Michael Brooks investigates its mysterious ways.
1. What is gravity?
2. Why does gravity only pull?
3. Why is gravity so weak?
4. Why is gravity fine-tuned?
5. Does life need gravity?
6. Can we counter gravity?
7. Will we ever have a quantum theory of gravity?
