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

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...

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 ...

TF阅读真题第854篇Why Did Social stratification Emerge

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...

TF阅读真题第799篇Surviving as a Conifer

TF阅读真题第836篇Changes in Ancient Egyptian Art Production

TF阅读真题第850篇The Australian Megafauna Extinctions

TF阅读真题第841篇The Beginnings of Radar Astronomy

  Periglacial Mounds   Periglacial regions are cold-climate areas that are located near the margins of glaciers-permanent ice sheets covering parts of the Arctic and ot...