TF阅读真题第686篇Physiological Adaptations of Tuna

TF阅读真题第730篇The Human Appendix

    Economics begins with the assumption that human actions are rational-intended for maximum self-benefit. For example, people pay more for a larger box of the same cer...

TF阅读真题第701篇The Domestication of Dogs

TF阅读真题第818篇Easter Island statues

TF阅读真题第781篇Origins of the Deciduous Forests

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...

  Making the Most of Dark Nights       The main breeding station of the marine bird known as the swallow-tailed gull is the Galápagos Islands, which straddle...

TF阅读真题第835篇Sauropod Teeth and Nostrils

  Climate change has been linked to greenhouse gases in Earth's atmosphere that allow sunlight to reach the planet's surface while trapping the infrared energy that it emits...