塑胶中的化学物质 (1)
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科学60秒:和藻类共生的蝾螈
A rolling stone gathers no____1____. But a salamander embryo can attract algae. Inside its tissues and cells. This intimate________—the first ever seen between algae and a vertebrate—is reveale...
告别寂静的春天
故事Rachel Carson was a scientist and a bird watcher. She noticed, in the late '50s, the gradual disappearance of some birds, and linked it to our use of 1)pesticides. She wrote a book about her ...
长寿之道:对未来充满希望 (1)
Hints:Hilary Tindle Pittsburgh PennsylvaniaHere is a good reason to be hopeful about the future: it might help you stay alive. Findings from a new study were presented at a recent meeting of the...
防止食物变质的妙方 (1)
Nigeria Mohammed Bah Abba A few degrees can make a big difference when it comes to food storage. Foods can go bad if they get too warm. But for many of the world's poor, finding a good way to ke...