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  1. Why is a magnet classified as dangerous goods when shipping by air? (more)
  2. Why are tanks (such as scuba diving tanks, for example) always designed in a cylindrical shape? I...(more)
  3. If splitting the atom can create a huge amount of energy, then why isn't it used to power engines...(more)
  4. How much energy in joules will be produced from an exploding mini black hole that is 10 microgram...(more)
  5. Can you verify the scientific validity of statements I've heard animal rights groups make, includ...(more)
  6. Lightning strikes produce huge amounts of electricity. Has science looked at ways to store and us...(more)
  7. I imagine there must be a gene for lactose tolerance in mammals and humans? They have to have it,...(more)
  8. How many active volcanoes are there at any onetime on the Earth, and how much "Greenhouse" gas do...(more)
  9. What are the components of a fever strip and the chemical principles behind it? (more)
  10. Why does lemon prevent the browning of apples? When browning of apples is caused by a reaction wi...(more)
  11. Given that the Earth's magnetosphere is what protects us and all life on Earth from the deadly ra...(more)
  12. Why does a sperm in the female reproductive system not get attacked? It has foreign antigens, whi...(more)
  13. Is it possible to focus gamma rays into one beam and then reflect it off an orbiting mirror onto ...(more)
  14. Today a girl in my class asked the question "Can you save yourself from an elevator falling 10 fl...(more)
  15. My brother and I have a very important bet and it is about the following: If you remove the elect...(more)
  16. What is the significance of Science in our society? (more)
  17. Some shampoo is coloured in the bottle (purple or green) etc, why when you lather it up in your h...(more)

  18. I'm curious about the possibility of "real"  superheroes.  Even though I t...(more)

  19. I have been teaching high school science for 16 years and I am interested in knowing what you fee...(more)
  20. Why does a digital camera need a shutter- I think it should be able to electronically shunt the i...(more)