For the last week or so, the world has been watching with horror the Chinese city of Wuhan, the epicenter of a new viral disease outbreak. The catchily-named 2019-nCoV is a coronavirus, one of a very large family, but this particular version is very new (in fact, genetic research is suggesting that it might be only a few months old, having evolved by spontaneous mutation late in 2019). However, Coronaviruses themselves are nothing new - they are in fact ubiquitous, and most species of animals seem to have their own. So, what do we know about coronaviruses? Where did this one come from? And what’s the impact, especially on animals, likely to be?