Pinsault, Anxionnaz and Vuillerme speculated that repeated violent impacts on the cervical spine impair muscle function and proprioception, which is important for the initiation of spinal reflexes that act to stabilise and protect the cervical spine.
Bighorn sheep (Ovis canadensis) routinely experience violent impacts to the head as part of intraspecific fighting.
The glass (in green, above), formed in the intense heat of violent impacts, is a common feature on Mars.
But if they are as ancient and delicate as they appear, their survival on 67P suggests that the comet was not exposed to high temperatures or violent impacts.
In an effort to appear tough on crime without going to prohibition-and-confiscation route, the authors of the AWB ended up crafting a loophole-ridden mess of a bill, which mostly banned guns based on how scary they looked and had no discernible impact on violent crime.
So if the White House's proposals are "on the level" of past gun control legislation — a category that also includes the 1994 Assault Weapons Ban, whose impact on violent crime rates was likewise invisible to analysts — then we should expect similarly disappointing results.
She also believes that there is not enough evidence that the law had an impact on violent felony rates or recidivism.
