Scientists in the US make detailed 3D maps of the cavities carved by comet dust in blocks of foam carried by Nasa's Stardust spacecraft.

Stunned scientists announce the unexpected discovery of large quantities of oxygen on a comet which streaked past the Sun in August with a European spacecraft in tow.

Scientists identify two complex organic molecules, or building blocks of life, on a comet for the first time, shedding new light on the cosmic origins of planets like Earth.

The European Space Agency (Esa) says its comet lander, Philae, has woken up and contacted Earth.