Doug Craig via Facebook asked:
Do scientists ever get scared of accidentally destroying the world?
Graeme - Well, most of my work is actually on a computer, so that's fairly safe, so unless the computer is going to blow up itself, then we’re okay. Other scientists? I guess it depends. Chemists, I don't think there's a big risk that we’re going to blow up the world.
Helen - I think us Marine Biologists are fairly safe as well, but it’s always something worth bearing in mind, I think, destroying the world accidentally through science – no, no, no.