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Snails do not grow in the winter. They do not come out of their shells at all then, even to eat. When they feel the cold weather coming, each snail finds some quiet place, where it makes a smooth hole in the earth to live in. Then it draws its body i
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This is scientific American sixty seconds science. I'm Christopher Intagliata. Got a minute? Lots of animals build homes for protection. Think Beaver lodges and termite mounds. Hermit crabs, on the other hand, inhibit hand-me-down homes. But they rem
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【NPR边听边练】致力于提供新鲜有趣、饶有意味的时讯资料，致力于通过精听的方式促进听力提高，致力于不断开阔眼界和深入了解美国观点。 精听建议： 先完整地把一条新闻听一到三遍，争
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Stress sucks. It can affect your body and mind. Previous research has shown that the stress can even hinder our ability to remember; but these studies have typically focused on one stress at a time. What happens if we face multiple stresses? Research
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台湾籍旅美老师今天交给我们的句子是： About one billion snails are eaten every year around the world. 每年全世界大约有10亿只蜗牛被吃掉
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A whole series of top-shell snails-greenish yellow ones fished up from American seas, others colored reddish brown that patronize the waters off Queensland, 其次，整整一组的洼贝，有些是青黄色，从美洲海中打来的, 另一些是棕
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