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As they do in many areas of medicine, stem cells hold great potential in treating injured spinal cords, but getting them where they need to go is a delicate undertaking. Scientists at the University of California San Diego (UCSD) are now reporting a breakthrough in this area, demonstrating a new injection technique in mice they say can deliver far larger doses of stem cells and avoid some of the dangers of current approaches.

The research focuses on the use of a type of stem cell known as a neural precursor cell, which can differentiate into different types of neural cells and hold great potential in repairing damaged spines. Currently, these are directly injected into the primary cord of nerve fibers called the spinal parenchyma.

“As such, there is an inherent risk of (further) spinal tissue injury or intraparechymal bleeding,” says Martin Marsala, professor in the Department of Anesthesiology at UCSD School of Medicine.

Have humans become an indoor species? Given that Americans spend, on average, 93 percent of their time indoors, it would seem that we are indeed suffering from what some call “nature deficit disorder.”

We don’t need a fancy term to realize we might benefit from spending more time outdoors. Getting out for a gentle walk or a vigorous hike is likely to reduce stress, improve health, and increase emotional well-being.

If you spend much time on a computer, you probably reach a time in the day when you have so many browser tabs and programs open that your computer slows considerably. It’s time for a reset.

There’s nothing quite like a maddening math problem, mind-bending optical illusion, or twisty logic puzzle to halt all productivity in the Popular Mechanics office. We’re curious people by nature, but we also collectively share a stubborn insistence that we’re right, dammit, and so we tend to throw work by the wayside whenever we come upon a problem with several seemingly possible solutions.

This triangle brain teaser isn’t new—shoutout to Popsugar for unearthing it a couple years ago—but based on some shady Internet magic, the tweet below reappeared in my feed today and kick-started a new debate on our staff-wide Slack channel, a place traditionally reserved for workshopping ideas, but instead mostly used for yelling about other stuff that we occasionally turn into content.

Researchers are investigating how the community of microbes living in the gut might help people with multiple sclerosis, lupus and type 1 diabetes.

Why you’re more of a sucker than you think.

Read more.

Rather than each country formulating their own brain projects independently, the project argues, it’s high time for the world to come together and share their findings, resources, and expertise across borders. By uniting efforts, the IBI can help shape the future of neuroscience research at a global scale—for promoting brain and mental health, for stimulating international collaboration, for ethical neuroscience practices, and for crafting future generations of scientists.

“It takes a world to understand the brain,” said Caroline Montojo of the Kavli Foundation, which offered support to the project. “When we have the best brains and the best minds working together, sharing information and research that could benefit us all.”

The initiative, at the time of writing, includes Japan’s Brain/Minds, Australian Brain Alliance, the EU’s Human Brain Project (HBP), Canadian Brain Research Strategy, the US’ BRAIN Initiative (BRAINI), the Korea Brain Initiative, and the China Brain Project.

Some scientists think quantum mechanics can help explain human decision-making.

Dreams can feel awfully real when you’re deep in sleep. Perhaps you find a hidden doorway in your home that leads to entirely new rooms and passageways. Maybe you went to work in your underwear—yikes.

When you wake up, you check your closet for that mysterious doorway; maybe you jolt awake in a cold sweat, instantly relieved you still have plenty of time to properly clothe yourself before leaving the house. Regardless, whatever you were experiencing felt very real just moments ago.

Dreams are essentially vivid memories that never existed. Yet you find yourself inside an all-encompassing parallel reality, a fantastical world that’s uniquely yours. The trouble with dreams, especially the fun ones, is that they’re fleeting. Often, you can’t remember a thing from a dream just moments after waking—the echo of some feeling is all that remains. But what if you could record your dreams, and play them back for analysis, or even share them with friends?