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.
The U.S. government is $14.3 trillion in debt. When we first neared the trillion-dollar mark in 1981, President Ronald Reagan said that the height of our debt amounted to a stack of $1,000 bills about 67 miles high. That's somewhere in the thermosphere.