What will happen when CERN's Large Hadron Collider is turned back on? Professor Jim Virdee previews some of the potential discoveries on the horizon.

Dr Mazdak Ghajari smashes the head of a crash test dummy to tell us how wearing a helmet protects your head from serious brain injuries.

And Dr Guillermo Rein explains why the 2001 World Trade Centre fires spread so rapidly, and how better building design can stop fire from travelling.

The podcast is presented by Gareth Mitchell, a lecturer on Imperial's Science Communication MSc course and the presenter of Click Radio on the BBC World Service, with contribution from our roaming reporters from the Research Communications team.

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News: COX2 pain relief inhibitors and Sir John Pendry’s million dollar Kavli Prize

A visit to CERN and the Large Hadron Collider: Gail Wilson takes a trip to the LHC and speaks to Professor Jim Virdee about what is happening at CERN while the collider is shut down, and asks what news we might expect to hear once it is turned back on.

Bike helmets and brain injuries: At the 2014 Imperial Festival, podcast presenter and motorbike lover Gareth Mitchell speaks to Dr Mazdak Ghajari from department of aeronautics about how a helmet can protect you from brain injuries after a serious collision, even if you are riding at a low speed.

Stopping fire from spreading: Dr Guillermo Rein tells Colin Smith about his research exploring why the fires in the World Trade Centre caused by September 11^th terrorist attacks spread so rapidly, and how different building design could stop fires from travelling through buildings.