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Latest Karen Warkentin Stories

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2008-11-04 09:05:00

Boston University undergraduate Jessica Rogge and associate professor Karen Warkentin, working at the Smithsonian Tropical Research Institute's laboratories in Gamboa, Panama, discovered that frog embryos at a very early developmental stage actively respond to oxygen levels in the egg"”as reported in the Nov. 7, 2008 issue of the Journal of Experimental Biology. These initial responses to the environment may be critical to the frogs' long-term survival. Red-eyed treefrogs, Agalychnis...

2008-05-20 16:22:23

When our distant ancestors were making their way out from the water, they had to evolve a way to lay their eggs on land. Now a tree frog could help shed light on this mysterious, pivotal moment in history. This little yellow Panamanian amphibian is the first known vertebrate that can lay its eggs both in water and on land. The researchers looked at the hourglass treefrog (Dendropsophus ebraccatus), which is also known as the pantless treefrog because part of its leg lacks color....


Word of the Day
tessitura
  • The prevailing range of a vocal or instrumental part, within which most of the tones lie.
This word is Italian in origin and comes from the Latin 'textura,' web, structure.