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.
Steve Forbes , Forbes Staff. U.S. National Debt: $1.1 Million Per Taxpayer. Each U.S. taxpayer now has a federal-debt liability of $1.1 millionâand rising. The public tends to focus on the total national debt, which just passed the $17 trillion markâup from $10.6 trillion when President Obama took office.