Flashbacks do occur, but very rarely.
The nation's research-grade cannabis is controlled by the National Institute on Drug Abuse, whose mission to curb use is at odds with that of researchers looking to study pot's therapeutic properties.
For the first time since the 1970s, researchers are being allowed to study the potential medical properties of the most tightly controlled substances around. But it's not easy.
This week's Newsweek proclaims that "Heaven Is Real"--a neurologist concludes it after a near-death experience. But how much do we know about those experiences?
Drug panic followed news that Sons of Anarchy actor Johnny Lewis went on a violent rampage last week after allegedly ingesting the new designer drug 2C-I, aka "Smiles," but there are a lot of factors to consider other than a direct drug-to-violence link.
The world's most prestigious universities have begun posting entire curricula on the Web—for free. Is there such a thing as a free higher-education lunch? I enrolled to find out
Researchers even found some associations between psychedelic drugs and fewer mental health issues.
Peace, love, and blacklight science
Drug researchers go along on a stochastic voyage.
The spouting horn is a remnant of activity that has occurred intermittently between 500,000 and 3.6 million years ago.
A reptile expert examines the evidence.
A new study found cognitively impaired former football players aren't much different from non-players with cognitive impairments.
But you'd be forgiven for thinking otherwise.
Researchers confirm the existence of this synthetic element in a new accelerator study. Will it be enough to give ununpentium official recognition and a new name?
Imagining a world without the father of evolution
A glimpse of "the toe of God"
Maybe it's not so easy to create stem cells after all.
Researchers used psilocybin to alleviate the fear of death.
The founder of littleBits on turning kids into creators
The meek inherited the Earth instead
Far out, man
The best long-form stuff we read this year
Is pure MDMA "absolutely" safe, as a Canadian health official claimed last year?
It's impressive researchers have managed to conduct even that many studies.
The exoplanet census is doubled again
And here you thought there were just solids, liquids, and gases
Bacteria have bonded carbon and silicon for the first time. What can they teach us?
A father-and-son team study the science -- and art -- of folding
Long hoped to represent the point where superheavy elements don't immediately decay, Ununquadium turns out to be not so stable after all
A picture starts to emerge from the fog
Why do we have fingerprints? How long can trees live? Why do cats purr? Artists illustrate humanity's most burning scientific questions.
No, it's not a superweapon.
According to the laws of physics, the world should not exist. To explain why we're here, scientists are recreating the universe's fiery beginnings by pitting matter against antimatter and watching them annihilate.
Researchers takes steps to observe the ghostly effects of quantum mechanics in objects larger than atoms
Could sulfur-based microbes live on Mars?
Maybe not the 'toe of God' after all
Astrophysicist Adam Frank's new book mixes cosmology with humanity. How does our understanding of the universe and cosmic time inform our daily lives? Especially if time is an illusion?
Jellyfish invasions, Internet auctions, god particles: Read about the year's biggest science stories before they happen. Bonus: How to decipher geeky jargon and when to buy a DeLorean
These mysterious creatures exist today more or less unevolved from the forms they had hundreds of millions of years ago
If you don't need to be in a solar system to have liquid water, then why not take your planet for a spin around the galaxy?
Maybe that's why we can't seem to find them
How 'Higgsy' is this particle? More work needs to be done
Medical and otherwise
Emerging viruses: Scientists scramble to find the natural hosts before they spawn another outbreak.
Not where you'd think.
A working, large-scale quantum computer is still a decade away, but researchers are currently turning a critical corner from theory to building the first small quantum systems
CERN physicists have made a particle that likely existed for just a microsecond after the Big Bang.
What do ghosts and yawns have in common? They remain scientific enigmas.
Solving Darwin's puzzle of kindness.
But what does it do?
At this year's spare but surprisingly upbeat North American International Auto Show, talk of an electrified future filled Detroit's Cobo Hall
After staring at the sun for hundreds of millennia, humans still have burning questions about it
Take your time. Have a good look at the unsavory characters behind your dead devices.
War. Disease. Disaster. Science played a key role in a good deal of the year's bad news. But the discoveries were astonishing, too.
No bigger than a pen, this device filters smallpox, Ebola and other viruses from the blood
The most complete dino yet uncovered gives researchers an unparalleled look at a Cretacean creature
Thanks to a highly sophisticated x-ray machine, scientists can now peer inside fossilized animals without destroying a hair
Tomographic analysis of a fossilized fish reveals the oldest brain fossil yet
Synthetic marijuana brand Spice may still technically be legal in the United States, but it's quickly getting banned around the world
This week in New York, a media-infused science extravaganza
We asked a writer to notice and decode the science claims he heard on a typical day. they averaged one every 10 minutes. And they werenâ€™t very scientific.
The theoretical energy ceiling for lasers is approaching
The massive plume scientists announced last week might already be gone
His manipulation of atoms chilled to near-absolute zero could help create high-temperature superconductors
Depending on who you ask, these long-ignored, widely-scattered elements are either a dealbreaker or no problem at all
How do centenarians live so long? And how fast can we sequence?