Against the law
Nature 496, 7443 (2013). doi:10.1038/496005b
Behaviours proposed for black holes conflict with the laws of physics.
Planetary science: Migrating planets sped up collisions
Nature 495, 7442 (2013). doi:10.1038/495413d
The pockmarked asteroid Vesta (pictured) has provided more hints about the history of the early Solar System.As giant planets such as Jupiter and Saturn shifted into place about 4.1 billion years ago, their changing gravitational pull flung asteroid fragments into highly eccentric