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Nasa scientist Steve W Squyres describes what it's like to man the controls of Opportunity and Spirit, the two planetary exploration rovers that are exceeding expectations as they search for signs of life on the surface of Mars

An investigation into what happens when we die is taking place in hospitals across the UK and US. Dr Sam Parnia, who heads the study, explains how he will record the out-of-body experiences of 1,500 patients

The large hadron collider at Cern is almost ready to start smashing open particles and expand our understanding of the universe. Paul Collier, who has been working on the machine, explains the mechanical challenges


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