What’s the answer to…?

On this page I’ll put my questions that I want to answer. If you know the answer you can put it in a comment.

  1. Can you go round the back of a black hole and see what it looks like from the other side?  If you put something in a black hole would it come out the other side, squished or spaghettified?
  2. What is the most advanced robot that’s been built so far?
  3. If a quantum particle has gone in a black hole can it still communicate with other quantum particles?
  4. This clip is really awesome but I don’t get why the Hubble sphere expands just because the universe is expanding. Anyone?
  5. Can you put daffodil DNA and forget-me-not DNA together to make blue daffodils and yellow forget-me-nots?  Or do they have to be more similar than that?
  6. Have they made robots using human DNA?
  7. Why do CRT TVs have so much static electricity?
  8. How exactly does the moon make waves?
  9. How does my new, adult tooth, know when to start coming up? What about the big teeth at the back – how do they grow?
  10. Have astronomers ever found a planet that’s exploded? What would it look like after it had exploded? Did the asteroid belt used to be a planet?
  11. How come worms carry on being alive if you accidentally cut them in half when you’re digging in the garden?
  12. Why do the colours on laptop and TV screens look different from different angles?
  13. Can you use a human being to power a light bulb like you can with a lemon?
  14.  I saw a video of someone dropping a really strong magnet through a really fat copper pipe, and it fell really slowly.  Would it still work if I used normal copper pipe and a tiny magnet?


4 thoughts on “What’s the answer to…?

  1. These are great questions. I’ll do what I can with the ones I know anything about.

    1. According to most scientists, nothing can be emitted from a black hole, because the gravity is so strong. So you can’t see a black hole as light cannot get out. Anything going into a black hole will just get squished down to be tiny and dense and stay there.
    However, more recent researchers have suggested that radiation can leave a black hole (Hawkings radiation), and a very very new paper claims mass can leave a black hole, which means black holes aren’t really black holes. This last idea is so new no-one has been able to review the idea yet.
    5. Scientists usually don’t just mash up two sets of DNA to create specific traits–because you might get anything at all, or nothing. More often they would try to look at the exact gene that ‘expresses’ colour or scent and then try to modify that, by turning on the expression, by modifying the epigenetics (things around the genes that are equally important in how the genes influence traits) or by taking the one gene out of the daffodil DNA and putting it into the bluebell DNA.
    8. The moon doesn’t make waves, which are made by a whole range of things like winds, currents, tides, rocks etc, but it does make tides. The moon is big enough and close enough exert a gravitational pull on the water in the sea. So as the moon orbits the earth each month and the earth spins each day, the bit of the sea closest to the moon gets dragged a bit here or there. That looks like tides to us. (And yes, other close bodies like the sun also affect us!)
    10. It’s hard to see exploded planets because they are smaller and darker than stars (which we know more about). Sometimes they become asteroids, but only the solid bits (planets are also made of dust, ice and gas). The asteroid belt is made of lots of debris, some from old planets but also from other kinds of interstellar bits.
    14. Yes, but the ratios would have to be right and the effect might not be strong enough for you to see without special equipment (small pipe, small magnet, small effect).

    I hope these help! Keep asking questions!

    1. My previous answer to 10 is now scientifically superseded.
      Unlike stars, planets do not explode. However, they can collide with one another (for example this is how scientists currently think the Earth got the moon).
      The asteroid belt however is more likely made up of dust and rocks that have never been part of planets, but rather like the rubble leftovers of a building site.

  2. 11. I know how they survive. They have five hearts in each section of their body. So if one section gets cut off they still have four hearts.

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