Mission to Mars scientist Colin Pillinger dies
8 May 2014 Last updated at 10:34 BST
British planetary scientist Colin Pillinger, best known for his 2003 attempt to land a spacecraft on Mars, has died aged 70, his family have said.
Prof Pillinger was at his home in Cambridge when he suffered a brain haemorrhage and fell into a deep coma.
His family said he later died at Addenbrooke's Hospital without regaining consciousness.
His death was "devastating and unbelievable", they said in a statement.
Pallab Ghosh reports.