Nasa delays trip to Mars carrying Perseverance rover amid fears it could miss chance to launch

Nasa has been forced to delay the launch of its newest and most ambitious Mars rover – leading to fears it might miss its launch window entirely. The Perseverance rover and its associated mission will cost about $3 billion. It will look for signs of Martian life in the past, as well as gathering materials from the surface that will one day be returned to Earth.