Vet Stuart Eves helps dish up an answer to Annie's question...
Are there ways to improve them to generate more renewable energy?
If light is sometimes a particle and sometimes a wave, would two rays bounce off each other or pass through?
Climate scientist Ella Gilbert sets the record straight...
And which are the best sequences to pick?
What's the best way to heat your home?
Do hairs grow out grey, or do hairs that had colour eventually turn grey?
Is the universe really expanding?
How does cancer evade the immune system?
Why are we focused on pigs?
What's going on at CERN?
How long can we keep hearts alive outside of the body?
What actually is a calorie...
What makes our own cells safe from antibiotics?
What on Earth is a neutrino?
"What's worse - fat or sugar? Who really are the bad guys nutritionally speaking?"
Can your mood influence your immune health?
Can a broken heart harm your health?
Why are some of us drawn to food when we're stressed?
As the volume of water in the ocean increases, sea level does not rise uniformly everywhere...
And how would they know your blood group anyway?
What happens during cataract surgery?
What's a server farm, and how might they be affected by climate change?
Where do birds sleep? If it's in trees, why don't they fall out when they nod off?
How fast is technology progressing?