In birds, hormones may not be the last word in determining males and females.
The Roslin Institute at the University of Edinburgh
The Roslin Institute at the University of Edinburgh
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Top Stories | March 11
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Researchers have filled in about 40 percent of the tree of life for mammals and birds, but other vertebrates lag behind.
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Collagen gives the creatures a bug-catching advantage in chilly conditions.
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Pesticides are agents designed to rid targeted portions of the human environment of undesirable critters – such as boll weevils, roaches or carpenter ants. They’re not supposed to harm beneficials. Like bees. Yet a new study from China finds that two widely used pyrethroid pesticides – chemicals that are rather “green” as bug killers go – can significantly impair the pollinators’ reproduction.
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Odorous house ants act like invading aliens when they discover urban living.
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More in Life
Odorous house ants act like invading aliens when they discover urban living. Hatchery fish are unlikely to restore caviar-producing fish populations, a new assessment finds. A pinch of methylmercury is just ducky for mallard reproduction, according to a new federal study. The findings are counterintuitive, since methylmercury is ordinarily a potent neurotoxic pollutant. Motherly fights for excrement in one species of dung beetle have favored the evolution of a special female horn. A study of a rare Norwegian fossil narrows down when polar bears evolved and finds they are closely related to modern-day brown bears in Alaska. |
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Science News
In species with pregnant males, females may put something extra into eggs.2|27 Issue Links New species have evolved at a surprisingly rapid pace, new study suggests Analysis of a fossil suggests plumage first evolved for display, not flight. Researchers find microscopic structures in some fossils that may have held pigments. A computer simulation finds that leaves' circular networks are efficient at getting around damaged spots and varying distribution load. |
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- Country ants make it big in the city
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- Science & the Public : Fowl surprise! Methylmercury improves hatching rate
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