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Latest Christopher Raxworthy Stories

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2009-04-17 09:39:18

Records test competing theories about the evolution of local species There is a new tool for those developing conservation strategies for threatened species and landscapes: museum specimens. Richard Pearson and Christopher Raxworthy of the American Museum of Natural History dusted off a number of collections from Madagascar and used the location information associated with each species to test different ideas regarding the evolution of locally distributed endemism (unique species confined to...

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2008-07-01 15:25:00

Herpetologists discover that a Malagasy chameleon spends most of its short life in an egg There is a newly discovered life history among the 28,300 species of known tetrapods, or four-legged animals with backbones. A chameleon from arid southwestern Madagascar spends up to three-quarters of its life in an egg. Even more unusual, life after hatching is a mere 4 to 5 months. No other known four-legged animal has such a rapid growth rate and such a short life span. The new research is reported...

2008-06-14 13:27:08

Global warming is forcing 30 species of reptiles and amphibians to move uphill as habitats shift upward, but they may soon run out of room to run. The shift could cause at least two toad species and one species of gecko in Madagascar to go extinct by the end of this century, a biologist says. Uphill movement is a predicted response to increased temperatures, researcher Christopher Raxworthy of the American Museum of Natural History says. Earlier studies in Costa Rica have provided...

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2008-06-09 13:15:00

New research from the American Museum of Natural History shows animals are moving uphillNew research from the American Museum of Natural History provides the first detailed study showing that global warming forces species to move up tropical mountains as their habitats shift upward. Christopher Raxworthy, Associate Curator in the Department of Herpetology, predicts that at least three species of amphibians and reptiles found in Madagascar's mountainous north could go extinct between 2050 and...


Word of the Day
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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