Reiterating the belief that HIV is the cause of AIDS is an easy thing to do. Understanding the science and politics of the situation is much more complicated and requires study with a critical and open mind.

When a person tests positive for HIV, it is not a test for the virus itself but for antibodies to the virus, and the test is not able to distinguish between HIV antibodies and a multitude of other antibodies. Many conditions can lead to a false positive result, including flu shots, hepatitis, and pregnancy.

I have full confidence in the ability of Foo Fighters' audiences to distinguish between questioning HIV and the obvious value of safe-sex practices.

How do you be a 45-year-old man in a rock band, do it well, keep your dignity and not become a parody of yourself? I don't think it will be simple.

People assume that science is a very cold sort of profession, whereas writing novels is a warm and fuzzy intuitive thing. But in fact, they are not at all different.

The free market is the epitome of life itself. This is something that all scientists recognise because science itself operates on free market lines.

I've always been interested in animal behavior, and I keep reading about it because it's so surprising all the time - so many things are happening around us that we neglect to look at. Part of the passion I have for biology is based on this wonderment.

I was good at math and science, and I got lots of degrees in lots of things, but in a parallel universe, I probably became a chef.