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.
Total US debt at the end of the first quarter of 2014, on March 31 totaled almost $59.4 trillion-up nearly $500 billion from the end of the fourth quarter of 2013, according to the data. Total debt (the combination of government, business, mortgage, and consumer debt) was $2.2 trillion 40 years ago. âIn 50 short years, debt has gone from being a luxury for a few to a convenience for many to an addiction for most to a disease for all,â James Butler wrote in an Independent Voters Network (IVN) op-ed.