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.
Currently, the average credit card debt per U.S. household is $15,270, and in total, Americans owe $856.9 billion in credit card debt, based on American Household Credit Card Debt Statistics as of January 2014.