What sort of music do you listen to? <a href=" http://threesistersfarmtx.com/about/ ">accutane end month 2</a> That was what we used to think, anyway. But in recent decades, it has become clear that our cosmic neighbourhood, in more recent times, has not been as benign as was thought. In the 1980s, for example, it was confirmed that Earth has been hit several times in its history by objects from space &ndash; none big enough to sterilise the planet completely, but a handful packing enough of a punch to change the course of life forever. The most famous of these was our collision with a six-mile-wide asteroid 65 million years ago, whose fiery passage into the Mexican coast has been blamed for killing off, or at least delivering the coup de grâce to, the dinosaurs.