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Calcium Makes Germs Cluster: Ion dilution leads cholera bacteria to disperse

A protein on the surface of cholera-causing bacteria enables the pathogens to clump together in seawater and to scatter when they enter fresh water, perhaps facilitating seasonal outbreaks of cholera in coastal areas.

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This article says that emotions can both decrease and enhance memories of specific events. It’s been over 40 years since President John F. Kennedy was murdered, and I can remember being in my U.S. History class and hearing the news on the loudspeakers, as if it happened an hour ago. I have absolutely no memory […]

Forgetting to Remember: Emotion robs memory while reviving it

A common biological mechanism may boost memory for emotional events and block recall for what happened just before those events occurred, at least over the short run.