0:34 A new model animal The sea urchin may be a good model for understanding how immune responses work in humans and other vertebrates.
6:03 Friend or foe? Mutations in a single gene can affect whether some bioluminescent bacteria will make good partners for squid.
13:03 The anxious brain A region of the brain called the intraparietal sulcus becomes more active when volunteers expect to receive a shock.
17:39 Training scientists to collaborate Two institutes on opposite sides of the Atlantic developed a joint course to encourage networking between early-career researchers.