0:49 How flatworms regenerate tissue How are organisms such as planarians able to grow new heads and tails?
6:54 The evolution of photosynthesis Computational techniques have shed fresh light on how C4 photosynthesis evolved from C3 photosynthesis.
13:34 Social interactions in mice Mice that grow up in environments with lots of stimuli are less social and more territorial than mice that grow up in more spartan surroundings.
16:43 Undead cells and cell death at a distance Cells undergoing programmed cell death release signals that trigger apoptosis in distant cells.
23:26 Turning transcription on and off in single cells How much steroid is needed to switch on a single gene?