Nasa Curiosity rover successfully lands on Mars
6 August 2012 Last updated at 13:51 BST
The US space agency has landed a huge new robot rover on Mars.
The one-tonne vehicle, known as Curiosity, was reported to have landed in a deep crater near the planet's equator at 06:32 BST (05:32 GMT).
It will now embark on a mission of at least two years to look for evidence that Mars may once have supported life.
David Shukman reports.