That's very much the kind of process that we focus in on. We call it a self-fulfilling prophecy; it's the expectation that a large crowd of supporters is going to cause a problem and then what you do is throw resources at it because you feel you need to control it. The idea is very traditional that the crowd is very irrational and it needs to be controlled. Resources are thrown at it and the expectation of trouble means that the officers are stressed and wearing protective equipment. They're much more likely to lash out and then if a small incident occurs in that crowd, then what we see is what people call a heavy handed reaction, which is basically a large number of officers driving forcefully into the crowd. That crowd contains people that haven't done anything wrong and didn't intend to be involved in violence. They find themselves being physically assaulted and it makes them wonder why they are being treated in that way. This draws people in the crowd into violence when they had no intention prior to police intervention of engaging in violence.

People were quite interested in a couple of moons around other planets, for instance, Titan. This is because it has a very large store of organic molecules. Because it's near Saturn, which has a very strong magnetic field, it has the ability to bend and stretch Titan. The strong compression and expansion creates a lot of heat and people think that this might be sufficient to cause water to exist in liquid form in those liquid worlds and they therefore might be a good spawning ground for life. The thing about the hydrothermal vents on Earth is that the life you find there all evolved originally from bacteria that depended on the sun's energy. They then became specialised, rather than being a brand new form of life that just appeared there, which is ever so subtly different. It's perfectly plausible that it might happen on another planet though.