Rosetta spacecraft spots enormous sinkholes on comet 67P

Discovery rules out many theories of comet formation by demonstrating that comets have substantial variations in their internal structures

Cameras on the Rosetta spacecraft have spotted a series of enormous pits on comet 67P/Churyumov-Gerasimenko that plunge hundreds of metres down into the body's cold interior.

Scientists on the mission believe the pits formed in the same way as sinkholes on Earth, which appear out of the blue when the natural ceilings above underground caverns suddenly collapse under their own weight.