Detailed text transcripts for TV channel - MSNBC - 20120316:04:25:00
A long time ago, and that is the only way to tell temperatures from hundreds of thousands of years ago, it can be misleading to use tree rings for data that covers the last 50 years. luckily, in the last 50 years, we've got other ways of telling temperature. there are other temperature records around, so you can combine that recent data with the tree ring information, so as to make sure you're keeping the data on temperature accurate over time. scientists work like that. science sometimes works like that. the data has to be as accurate as possible, and since data doesn't come down from a mount...