单词：hydrofoil amphibian
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This is Scientific America's 60 second science, I'm Sentay Graber, this will just take a minute. Magnifying glass, telescope, tiny tiny tape measure, these are the weapons with which researchers are fading it out to find the world's smallest frog.One
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Sidney was a 14-year-old boy with an interest in the sciences. One summer day he started his own investigations. With his 12-year-old sister Sophie in tow, he caught a large bull frog in a local pond. Sidney started his experiment with the amphibian,
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AS IT IS 2016-02-16 Students Learn Hands-on With Animals 学生学习如何照顾动物 Talking birds, goats butting heads, and a giant tortoise that hangs out with chickens are all part of a living classroom. High-school students at the Career Cente
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