Carl Hart Discusses the Most Popular Drugs in America

Question: What are the most popular drugs in the United States?

Hart:    So the most popular drug in the US of course is alcohol, largest number of users about are alcohol users.  I think there is about a 125 million folks who use alcohol in the past month.  Then you have drug like marijuana and tobacco.  Marijuana I think is about 15 million current users that is in the last month.  Tobacco maybe about 30 million to 40 million current users.  So those are the big ones and now you think about other drugs that are used in the US psycho active drugs, when you talked about cocaine, cocaine is next and I suspect it’s about 2 million I think, amphetamines less than a million, heroin less than a million sort of regular users but the prescription of be at drugs I believe there are about 4 million of those folks whoa re taking the drugs without a prescription so you can see that alcohol overwhelms those statistics and that’s by far the most popular in part because it’s legal whereas this other drugs are less available.

The professor says alcohol is the most prevalent drug in America followed by tobacco and marijuana.

Beyond the two cultures: rethinking science and the humanities

Cross-disciplinary cooperation is needed to save civilization.

Credit: Public domain
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Stephen Hawking's black hole theory proved right

New study analyzes gravitational waves to confirm the late Stephen Hawking's black hole area theorem.

Credit: NASA's Goddard Space Flight Center
Surprising Science
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Is the universe a graveyard? This theory suggests humanity may be alone.

Ever since we've had the technology, we've looked to the stars in search of alien life. It's assumed that we're looking because we want to find other life in the universe, but what if we're looking to make sure there isn't any?

According to the Great Filter theory, Earth might be one of the only planets with intelligent life. And that's a good thing (NASA, ESA, and the Hubble Heritage Team [STScI/AURA]).
Surprising Science

Here's an equation, and a rather distressing one at that: N = R* × fP × ne × f1 × fi × fc × L. It's the Drake equation, and it describes the number of alien civilizations in our galaxy with whom we might be able to communicate. Its terms correspond to values such as the fraction of stars with planets, the fraction of planets on which life could emerge, the fraction of planets that can support intelligent life, and so on. Using conservative estimates, the minimum result of this equation is 20. There ought to be 20 intelligent alien civilizations in the Milky Way that we can contact and who can contact us. But there aren't any.

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Ethical hacking: saving society with computer code

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Credit: NICOLAS ASFOURI via Getty Images
Politics & Current Affairs
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