In early solar system formation, technically everything was ramming into each other and colliding.
All the planets were bombarded violently for quite a long time after their formation and cooling - a casual look at Mars during the Hesperian and Noachian eras tells that.
Certainly, comets and other large bodies collided into planetoids - were someone to say the opposite, I would be very surprised.
All the planets were bombarded violently for quite a long time after their formation and cooling - a casual look at Mars during the Hesperian and Noachian eras tells that.
Certainly, comets and other large bodies collided into planetoids - were someone to say the opposite, I would be very surprised.