考古：寻找并理解遗址
As you’re learning, there are many amazing techniques available to modern archaeologists. These involve detailed study of small areas of ground, but how do people know where to start looking in the first place?
艺术体验的心理构成
We love looking at art. We put it on our walls. We see it at museums. And if we’re inspired, we may even create it. What is it about our art experience that makes it so enjoyable? We can appreciate art as one of those things we do simply for a pleasurable experience—such as when we listen to music, watch a movie, or read a novel. For most of us, these activities capture our attention and spark an emotional response . Although our survival does not depend on such activities, our lives would seem so much less enjoyable without them.
生命可能在哪些环境下生存？
Places where life can thrive vary widely on planet Earth. Scientists find the greatest diversity in rainforests with abundant water and mild year-round temperatures.
In contrast to Earth, somewhere like Mars seems like a bleak wasteland. With an atmosphere that’s about 100 times thinner than Earth’s, the planet surface can’t hold in heat well. A summer day at the Martian equator might get up to 20℃ at noon
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