It's unclear whether or not they help people quit real cigarettes.
The May 2015 issue is here
How and why are tougher questions.
Now that recreational marijuana is legal in two states, lawmakers and law enforcement have to grapple with how best to deal with cannabis-impaired drivers.
Three myths your teachers told you about how your brain learns, debunked
Will too many hot chili peppers kill you? Is the moon on the verge of erupting? PopSci tackles life's whys, hows and who-dunnits in this Q&A-style; feature
Related: Can cats get high on marijuana?
Our editors scrounged up some truly bizarre facts.
Stories from the coolest day jobs in the world.
The ability to reprogram the immune system is one of the most sought-after goals in medicine. Now researchers are closer than ever to pulling it off in patients with Type 1 diabetes, one of whom happens to be our correspondent
Our emotions shape which language we decide to use.
In the not-so-distant future, these six drugs--already in the works--will change how we live, and even how we die
Tweaking texture could give us healthy versions of our favorite junk foods—and that's just the beginning
Your cellphone does not in itself cause cancer. But in the daily sea of radiation we all travel, there may be subtler dangers at work, and science is only just beginning to understand how they can come to affect people like Per Segerbäck so intensely
If a few very smart neuroscientists are right, with enough number crunching and a powerful brain scanner, science can pluck pictures—and maybe one day even thoughts— directly from your brain
PopSci tackles life's whys, hows and who-dunnits in this Q&A-style; feature
Researchers manipulate a certain brain wave to slow down voluntary movement in humans
Breaking the binary
Practice with close friends only
Obesity is booming, yet there are only two medications approved for long-term weight loss. Why is it so hard to make a diet pill that works? For one thing, evolution hates diets
The implants would use light pulses to activate certain brain regions and reroute function