A dangerous knife thug freed from jail by mistake was today jailed for life with a minimum of 40 years for the "sadistic" murders of two brilliant French students.

Exfoliation is the first step in any summer metamorphosis, especially one involving fake tan. After all, you wouldn't start repainting a wall – a job which is about as exciting as applying bronzer – without stripping the manky old plaster first. However, when it comes to exfoliation, stripping is the last thing one wants; rather, it's key to find a product that creates an even surface for the colour to take to without damaging the skin.

Nathaniel Saidu, 25, is doing an MSc in biocatalysis at the University of Exeter

Two French students were tortured and murdered in a London flat in a scene of "almost unimaginable horror" when a burglary at their home went wrong, a court heard today.

A man accused of murdering two French students during a frenzied attack at a London house admitted today he had carried out a burglary at the property.

A newly discovered molecule linked to aggressive prostate cancer could open the door to better ways of tracking and treating the disease, say scientists.

The biochemist James Baddiley was a master of experimentation, with an intuitive ability to deal with the vagaries of organic compounds. Although he was an organic chemist by training, his research brought him increasingly into the field of biochemistry and biology. When each new problem presented itself, he learned or devised the experimental techniques necessary for its solution. He used the methods and insight of the organic chemist to answer important questions in biology, notably with regard to coenzyme structure and function, and the structure of bacterial cell walls.

A major discovery could open the door to "one-fits-all" cancer drugs that can tackle many different forms of the disease.

Hal Dixon was a biochemist, a Life Fellow of King's College, Cambridge, who was cleverer than most of his colleagues, enthusiastic and energetic, but who never achieved the heights of scientific success that his abilities merited. But he was a wonderful colleague, friend and teacher.

A 21-year-old man was arrested in the early hours of yesterday in connection with the murders of the French students Laurent Bonomo and Gabriel Ferez.

They were two students who came to London from France to study, and had agreed to extend their stay by a month because they were enjoying it so much.