Can viruses catch colds?

Do birds have a sense of smell? Are penicillin allergies permanent? How do vultures identify dinner? Does light travel forever? Is alcohol added to cooked food safe for an alcoholic? Do viruses have viruses that prey on them? How do bees track down my beer? Are some people genetically programmed to commit crime? Can two twins have different fathers? How did the power of speech first evolve? Dr Chris Smith has the answers... Like this podcast? Please help us by supporting the Naked Scientists