Taking Earth's Temperature

摘要

ASK NASA CLIMATE scientist Gavin Schmidt "What's the temperature of Earth?" and he'll tell the story about the museum visitor who wanted to know the age of a dinosaur on exhibit. A guard answers that it's 65 million and 10 years old. How'd he get such a precise number? "He says, 'Well, when I came here they said it was 65 million years old, and I've been here for 10 years now,'" Schmidt quips.