NASA's Curiosity rover has successfully landed on Mars late on Sunday, poised to begin its pioneering two-year hunt for the building blocks of life on the Red Planet. The mission, costing around $2.5bn, will examine rocks in Mars' Gale Crater for signs that ancient environments on the planet could have supported microbial life. What will Curiosity tell us about Mars? Guests: Francisco Diego, Luther Beegle.
