If you could un-invent something, what would it be?

Yes, I know that there are weapons that have as much power as nuclear bombs but they are big and heavy and more difficult to lob at your enemies. I think we should un-invent nuclear weapons.

I would still keep power stations if they were built with safety features that stop incidents like three mile island, chernobyl and fukushima. Mainly because of the horrific damage nuclear material can cause. It’s tasteless and does not smell and you can’t feel it, but it burns and causes cell damage and death.

Sometimes radioactive isotopes are used in medical techniques such as imaging areas affected by tumors or other illnesses. I would keep these substances. I’m glad that the elements were discovered by scientists such as Marie and Pierre Curie, but turning it into bombs was, I believe, a terrible mistake. I realise they ended the second world war but the worry is that mutually assured destruction is still a serious possibility.