We’ve all heard the expression “the bee’s knees.” What I’d really like to know is, do bees really have knees?

What would happen if two planets collided?

Do hairs lose their pigment and then go grey or do the coloured ones fall out and they get replaced by the grey ones?

If you’re driving up a motorway and get a lorry next to you on the front wheel of the lorry the nuts are sticking out. As it’s driving it looks like a ring because it’s going so fast. If you really burp the nuts then stop whilst you’re burping. Once you stop they start revolving again.

If vampires were real, could a person live on blood alone? Also, in the film Soylent Green they dried people out to make tablets for other people to eat. Is that feasible?

Why is the moon sometimes visible during the day?

If your hair is red why does it go white? Does it change structure?

When does a meteor or meteorite grow in size to become an asteroid?

With regards impact craters on the Earth - how much would they differ on the Moon because of the lack of atmosphere, reduced gravity. Would a small meteor make a bigger crater?

Why can birds touch electricity wires when we can’t?

Do we bleed blue blood out of our veins? Presumably if you bleed blood it’s the oxygen that makes it turn red. If we bleed in a vacuum would it bleed blue?

Why does the road surface appear to shimmer when it’s hot?