By Sarah Knapton, The Telegraph Group Ltd, London, 2015

Articles from the author

Tim phones home from space, gets voicemail

Astronaut was forced to leave a message on an answering machine for his parents

Man-made virus can ‘cure’ skin cancer

New treatment allows some patients with melanoma to live for more than three years

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Blood test to cut deaths after surgery

Researchers have identified how differences in a person’s immune system can be used to forecast who will recover well

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