Bouncing Bombs & Deadly Volcanoes!

Dave Ansell

How can bombs bounce without going off? Could a volcanic eruption be deadly worldwide? What is St Elmo's Fire? Are computers worse for the environment than planes? We tackle these questions and more this week on Ask the Naked Scientists.

We also find out if different parts of our body could have different DNA, investigate how to create a car that's invisible to radar, discover what's special about Saudi oil and measure a light year.