Joe and Fergus chat about all things mercury and find that there's much more to it than just thermometers! It's been used since ancient times - some thought it was the key to eternal life, despite its poisonous nature. Find out more in this week's episode.

In this episode we welcome Colby to talk about nuclear power. Could it be the solution to the climate emergency? We also discuss a darker side of uranium - nuclear weapons - and play Science Fact or Science Fiction and Secret Scientist.

We've got a double whammy for you this week! Fluorine and Chlorine are elemental cousins. They're both halogens, highly reactive elements that sit in the penultimate column of the periodic table. In this episode, we talk about why fluorine is added to water and chlorine's deadly use as a...