Survival in the freezer
2 May 2013 
How do animals survive in the extreme cold? James Mitchell Crow investigates
Lean green microbe machines
30 April 2013
For its proponents, algae hold the promise of a clean source of fuel, food or drugs. Anthony King wades in
What does DNA do?
24 April 2013
The more we learn about DNA, the less we seem to know, as Philip Ball discovers
A fixation with nitrogen
18 April 2013
Despite decades of work to develop alternative ways to make ammonia, the Haber–Bosch process is here to stay, Mark Peplow discovers