The Ri caught up with presenter Dara O Briain on the set of Science Club to hear why he is such a fan of the group of elements known as the Alkali Metals. It might have something to do with Group 1's explosive reputation.
Each day in December, we'll publish a new video revealing the elements that really excite and inspire people. For an exclusive first look at the latest video visit the Ri's Online Advent Calendar: advent.richannel.org