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.
An Overview of the United States National Debt. The Current Outstanding Public Debt of the United States is: $19,428,079,384,183.27. Last Updated: Thursday, August 18th, 2016. Every man, woman and child in the United States currently owes $63,945 for their share of the U.S. public debt. Public Debt: $14,024,870,957,806.76. Intragovernmental Holdings: $5,403,208,426,376.51. Total U.S. National Debt: $19,428,079,384,183.27.