Origin of dromedary domestication discovered

Dromedaries have been used for transportation for over 3,000 years. But it was not known where they were first domesticated or which genetic structure was selected in the process. A team of researchers including Pamela Burger ...

What makes two species different?

Most evolutionary biologists distinguish one species from another based on reproductivity: members of different species either won't or can't mate with one another, or, if they do, the resulting offspring are often sterile, ...

Bacteria use caffeine as food source

A new bacterium that uses caffeine for food has been discovered by a doctoral student at the University of Iowa. The bacterium uses newly discovered digestive enzymes to break down the caffeine, which allows it to live and ...

Gene found that causes eyes to wither in cavefish

Mexican cavefish spend their entire lives in the dark. With no need for vision, many of them lost functional eyes. In more than 30 varieties of Mexican cavefish, the eyes stop developing as embryos grow into larvae. Although ...

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