The scientists say that their findings support the idea that some forms of mathematical thinking use an ancient skill, one that people share with their nonhuman ancestors.
"These data are very good for telling us where our sophisticated human minds came from," says Cantlon.
The research is an "important milestone," says animal-math researcher Charles Gallistel of Rutgers University in Piscataway, N.J., because it sheds light on how the ability to do math developed.
M...>>阅读全文
本文发布时间：2008-12-04 08:29 点击数：70
本文发布时间：2008-12-04 08:26 点击数：51
It could be that disease is causing the disappearance of the bees. To explore that possibility, Jay Evans, a research entomologist at the United States Department of Agriculture (USDA) Bee Research Laboratory, examines bees taken from colonies that are collapsing. "We know what a healthy bee should look like on the inside, and we can look for physical signs of disease," he says.
And bees from collapsing colonies don't look very healthy. "Their stomachs are worn down, comp...>>阅读全文
And bees from collapsing colonies don't look very healthy. "Their stomachs are worn down, comp...>>阅读全文
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