Some like it hot (if they’re riddled with parasites)

A stickleback is heading for a warm bath. While its peers prefer to swim in lukewarm water at around 16 degrees Celsius, this individual likes it hotter. That's not because of a personal preference – instead, it is being steered by a parasite. A tapeworm has lodged in its guts, and it needs warmer temperatures to grow… » 11/19/11 3:05pm 11/19/11 3:05pm