If you could invent anything what would it be

Question: If you could invent anything what would it be
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Asked by kirbykirbo00 to Andrew, Jade, Jessica, Kevin, Lynn on 19 Jun 2015.
- Jess Wade answered on 19 Jun 2015:
  
  Good question! I have just bought a new blender which moves at 286 km/hr- so fast it can heat up cold vegetables and make boiling hot soup just with speed !!! I’d like to invent a solar panel that turns all the energy from the sun into electricity. Now it is really hard to make them really efficient- the molecules are really lazy. I’d like to find a way to do it cheaply and wake up the lazy molecules so they do their jobs properly!
- Jade Owen answered on 22 Jun 2015:
  
  I would invent a simple test that would take a small drop of blood that would then let a doctor know which medicines would work best for you.
  Because our genetics are so different between people some medicines work better for some and not so well for others.
  So a quick test like that could help do votes prescribe better and make sure the patient gets the correct dose to make them feel better.

Question: If you could invent anything what would it be