Caves seen on the surface of a comet for the first time

By building a 3D image of part of the surface of a comet called 67P, astronomers have discovered caves up to 47 metres deep

​By building a 3D image of part of the surface of a comet called 67P, astronomers have discovered caves up to 47 metres deep By building a 3D image of part of the surface of a comet called 67P, astronomers have discovered caves up to 47 metres deep