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.
Fact: The government has $16.4 trillion dollars in debt. Fact: The U.S. Department of Commerceâs Bureau of Economic Analysis reports that the entire size of the U.S. economy is $15.9 trillion dollars. Fact: The government debt to GDP ratio is 103 percent.