Birds do it. Bees do it. No…we’re not talking about ‘falling in love,’ we’re talking about sex. Biologists have long known it plays a vital role in passing new gene combinations on to the next generation, but what’s been less clear, is exactly how that works. Now, a Virginia Tech Biologist has a new theory that challenges long held notions about natural selection and survival of the fittest. Robbie Harris has more.