It is evening. An old cock (公鸡) is sitting in a tall tree. A fox (狐狸) comes to the tree and 1 at the cock. “Hello, Mr. Cock.I have some 2 __news for you. ”says the fox. “Oh ”says the cock, “What is it ”“All the animals are good friends now. Let’s 3 fr...
Before we can nuke an asteroid, we need to find it first. NASA (and others) are looking for them, but it’s tricky. Early detection is key: if it’s close, it’s too late. If telescopes can identify an NEO (near-Earth object), then NASA and other astronomers can take pictures of...