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.
Most critics of the debt cite the fact that at $19 trillion, the national debt represents about 102% of the U.S. gross domestic product, the sum total of all the economic activity in this country each year. Sounds scary. But the health of a familyâs finances arenât measured this way.