Food Caching by Scrub Jays     The western scrub jay is a highly intelligent bird, and biologists have conducted a number of experiments on its cognitive abilities base...

TF阅读真题第842篇Waking Up: Coming Out of Hibernation

Opera in Seventeenth-Century Venice     Opera, a form of drama set to music and featuring vocal performance supported by an orchestra, was born in Italy at the very end ...

The Origin of Mars's Moons     Mars has two tiny moons, Phobos and Deimos. The orbits of both these satellites are nearly circular and close to the planet: Phobos orbits...

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How Fossils Map the Past     Only a tiny fraction of the organisms that have lived during the geologic past have been preserved as fossils.Normally the remains of an ani...

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TF阅读真题第850篇The Australian Megafauna Extinctions

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