Every weekday, NPR's best political reporters are there to explain the big news coming out of Washington and the campaign trail. They don't just tell you what happened. They tell you why it matters.

The average temperature of the Earth is rising at nearly twice the rate it was 50 years ago. This rapid warming trend cannot be explained by natural cycles alone, scientists have concluded. The only ...

PECOTA, which stands for Player Empirical Comparison and Optimization Test Algorithm, is BP’s proprietary system that projects player and team performance PECOTA is a system that takes a player’s past ...