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Latest Daniel Rabosky Stories

Two Venomous Snakes That Evolved Separately Are Strikingly Similar
2014-06-11 15:19:40

Gerard LeBlond for redorbit.com - Your Universe Online North American and Australian snakes evolved independently, but into similar body types over millions of years. These snakes are stout-bodied and highly camouflaged, which help them move and ambush prey more efficiently. As well, these rattlesnakes of North America and death adders of Australia are slender, fast-moving burrowers. A phenomenon called convergence is where two species evolve independently, but feature similar body...

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...


Word of the Day
vermicular
  • Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
  • Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
  • Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
  • A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.
This word ultimately comes from the Latin 'vermis,' worm.
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