Tony McCoy

You don't have to be Einstein to see that horse racing is dangerous. Those two ambulances driving behind you aren't there for the scenery. I will never get over the fatalities of colleagues. It is the saddest and toughest part of this sport.

What do cells do when they see a broken piece of DNA? Cells don't like such breaks. They'll do pretty much anything they can to fix things up. If a chromosome is broken, the cells will repair the break using an intact chromosome.