Editor's note

A former Russian spy and his daughter are in a critical condition after being exposed to an unknown nerve agent. Simon Cotton tells the story of how these compounds were first discovered and used – and explains why they are so lethal.

Whenever a high school shooting or terrorist atrocity takes place, it is often blamed on “radicalisation”. But widespread use of the word is a surprisingly recent phenomenon, says Rob Faure Walker, and may well be doing more harm than good.

We all know exercise does us good, but new research reveals that it can also dramatically slow down the ageing process. It’s time to get on our bikes, says Janet M Lord.

Miriam Frankel

Science Editor

Top stories

Investigators next to a police tent in Salisbury near to where Sergei Skripal was found critically ill. Steve Parsons/PA Wire/PA Images

Nerve agents: what are they and how do they work?

Simon Cotton, University of Birmingham

Nerve agents were discovered by accident in the 1930s.

omnimoney/Shutterstock.com

Use of the word 'radicalisation' is ballooning – and it's hiding the real causes of violence

Rob Faure Walker, UCL

The word only appears 14 times in the UK's parliamentary record between 1803 and 2005. Now it is everywhere.

Shutterstock.

Exercise can slow the ageing process – a professor explains how

Janet M. Lord, University of Birmingham

Doing exercise throughout your adult life can maintain your muscle mass, bone and immune system, and keep you healthy in old age.

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