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.
U.S. national debt hits record 9 trillion under President Barack Obama. 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). The main culprit behind the rising deficits and debt is growing federal spendingâespecially among Social Security, Medicare, Medicaid, and Obamacare.