It’s only day 2 but the questions keep coming! Over 35 live chats and hundreds more great questions.

Today’s highlights in the Quantum Zone:

• A levitating game of chess…

rara97 : explain the levitating chess game

jackmiller : They had superconductors stuck to their bottoms, and were cooled in liquid nitrogen above a bed of magnets! It turns out that superconductors have this really weird property where magnetic fields absolutely cannot change through them. So, if you have a material that becomes superconducting at a particular temperature — say that of liquid nitrogen — you can put them at a height above a magnet (by resting them on a block of wood), cool them down, remove the wood, and they stay there,

• Dave’s accidental chemical reaction:

meesh : have you ever caused an accidental chemical reaction? Did you get sacked?

davefarmer : yes- when I worked in a butchers shop I mixed together two different cleaners to scrub the floors. The fumes caused us to evacuate the shop!

meesh : Did you get sacked?

davefarmer : no, just no free steak for me that day

• And flying elephants?!

beatricerm : Could elephants really fly if they had big enough ears, like Dumbo?

jackmiller : Probably not. Ears aren’t aerofoil shaped, and wouldn’t give much lift — meanwhile, elephants are very heavy, and aren’t very aerodynamic. It’s likely that you could modify the shape of an elephant enough to make it fly, but it’d probably end up looking a lot like a bird…

davidfreeborn : I’m not sure about elephants. I once calculated how big wings a pig would need to fly: the answer is almost a kilometre!