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Last updated on April 23, 2014 at 11:40 EDT

Latest Daniel Rabosky Stories

Speciation Theory Questioned
2013-09-03 14:24:14

Brett Smith for redOrbit.com - Your Universe Online While scientists have catalogued millions and millions of species, there is still no agreement on how exactly new species form. However, a new study published this week in Proceedings of the National Academy of Sciences could deal a major blow to one prevailing theory - namely, that new species arise when a barrier prevents reproduction between populations. Species-creating barriers could be physical, such as a mountain range, or they...

2013-06-06 11:49:18

Efforts to restore sturgeon in the Great Lakes region have received a lot of attention in recent years, and many of the news stories note that the prehistoric-looking fish are "living fossils" virtually unchanged for millions of years. But a new study by University of Michigan researchers and their colleagues reveals that in at least one measure of evolutionary change–changes in body size over time–sturgeon have been one of the fastest-evolving fish on the planet. "Sturgeon...

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2010-12-21 08:22:45

It's long been accepted by biologists that environmental factors cause the diversity"”or number"”of species to increase before eventually leveling off. Some recent work, however, has suggested that species diversity continues instead of entering into a state of equilibrium. But new research on lizards in the Caribbean not only supports the original theory that finite space, limited food supplies, and competition for resources all work together to achieve equilibrium; it builds on...