Note: As Mike Yassa, the lead author on the study, pointed out to me, the study did not actually test whether consuming caffeine before a task enhances memory, the problem being that other confounding factors can then lead to difference in performances on the test.
The US debt is more than $20.1 trillion, the largest in the world. Here are the 3 reasons it grew so large, and how it damages U.S. economic growth. The US debt is more than $20.1 trillion, the largest in the world.
It came up with a total debt of $2 trillion for all states. California still owes the most under the alternative computation, but the state's total debt drops significantly, to $307 billion. With the Pew numbers, New Jersey follows with $183 billion of debt and Illinois is next at $150 billion.