Ask somebody about stress, and you're likely to hear an outpouring about all the bad things that cause it — and the bad things that result. But if you ask a biologist, you'll hear that stress can be good.
A gung-ho group of space enthusiasts has started the process of putting a vintage NASA spacecraft on a new flight path, so that this venerable piece of hardware will be able to do useful science once again.
Scientists at the National Institutes of Health made an unpleasant discovery last week as they cleaned out an old laboratory: The lab contained vials of the smallpox virus, previously unknown to authorities. The vials have since been transferred to a secure lab at the federal Centers for Disease Control and Prevention in Atlanta.
According to new research, plants can actually hear the sounds of insects chewing. A University of Missouri study is the first work to report that plants can recognize the sound of a predator through the vibrations of their leaves. To learn more, Robert Siegel speaks with Heidi Appel, senior research scientist in the Bond Life Sciences Center at the University of Missouri.