 | The five-month project took researchers to 21 countries; but only four of the targeted 100 were found. Researchers describe these as «glimmers of hope» in a group of animals severely threatened by changing land use, disease, pollution and climate change. Particularly galling was the failure to find the golden toad of Costa Rica. |
 | The sex of some species of turtles is determined by the temperature of the nest: warm nests produce females, cooler nests, males. And although turtles have been on the planet for about 220 million years, scientists now report that almost half of all turtle species is threatened. Turtle scientists are working to understand how global warming may affect turtle reproduction. To bring attention to this and other issues affecting turtles, researchers and other supporters have designated 2011 as the Year of the Turtle. |
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