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.
Read her research. On Monday the U.S. national debt hit a new record: $19,012,827,698,418. This is the first time the national debt has ever exceeded $19 trillion. Thatâs more than $58,000 for each person who lives in the U.S. today (including children). Thatâs more than $58,000 for each person that lives in the U.S. today (including children).