Engineering new solutions to climate change

Dr Chris Smith and the Naked Scientist team present the latest science news, analysis and breakthroughs.This week: What do we know about the pagers and walkie-talkies that have been used to attack Hezbollah fighters in Lebanon? Plus the landmark study on the impact of pregnancy on the female brain, and how scientists in Israel have grown a 1,000-year-old seed that might fill in a missing link in the Bible.We also take an in-depth look at the work of engineers who are finding fresh solutions to the problem of climate change.