Robert Powell

There's not a human being alive I won't talk to. There's a quite simple rule. If you like somebody more than you dislike them you can have a relationship. Once you accept you like 75 per cent but 25 per cent you find irritating for this or that reason, you just have to ignore that 25 per cent.

The genus Drosophila is one of the great success stories. There's hundreds of species within the genus. They're on every continent except Antarctica, they're in tropical rain forests, they're in deserts, they've evolved many exotic mating behaviors, and they're capable of incredibly long-distance flights.