In this space special, we learn how to study comets surfaces, and speak to a Nobel Prize winner about his 20-year-old prediction proving to be correct

We ask, does graphene live up to the hype, and discuss injectable electronics that unfold in the brain

What makes food sweet? How do we protect against food alteration? New e-paper, and possible treatment for ebola

We find out how nanotoxicology could be holding back development, and ask if 'patent or perish' should be the new academic adage

How do you smell? We discuss a controversial theory about odour detection, and investigate forensic toxicology

How cephalopods teach chemists about camouflage, and new ways to convert carbon dioxide into useful materials

Cannabis, peanuts and explosive investigations – all in the February 2015 Chemistry World podcast

How a new nanoparticle iron supplement can treat anaemia, and a run down of chemists in the new year honours

How nitrogen can make green explosives and why molecular communication might produce chatty nanobots

We speak to Eric Betzig about his Nobel prize-winning research, and find out how thermoelectric materials can be made more efficient