The mystery of what happened to the ship that ferried Charles Darwin around the world may have been solved. A team led by Dr Robert Prescott of the University of St Andrews has located what they believe are the remains of HMS Beagle beneath an Essex marsh. To explore the site further, technology designed for the UK's recent ill-fated mission to Mars is being considered. The two quests are linked by Colin Pillinger, who named his Red-Planet craft Beagle 2 after its 200-year-old predecessor.