Pennsylvania State University

Long before the Inka ruled the Andes, the Tiwanaku civilization carved out one of the region’s earliest and most influential societies. Then, about a thousand years ago, it vanished, leaving behind stone ruins and swirling mysteries.

Researchers have developed a 3D-printable electrode that looks like a single strand of human hair and measures brain activity more reliably than the current method used to diagnose things like epilepsy and sleep disorders.

It's not uncommon for patients to hide their true emotions from their caregivers – or even from their own conscious selves. An experimental new facial "sticker" could help, by detecting and relaying information on its wearer's present state of mind.

Imagine being able to listen to music or other audio that no one else can hear, without having to wear headphones. Doing so is now possible via so-called "audible enclaves," which already exist in functional prototype form.

Scientists have accidentally discovered a particle that has mass when traveling in one direction, but no mass while moving in a different direction. Known as semi-Dirac fermions, particles with this bizarre behavior were first predicted 16 years ago.

Binge-drinking in early adult years fundamentally changes how brain neurons communicate, in what scientists equate to a faulty gas pedal in a car that needs more pressure applied to "go." This type of dysfunction is also seen in Alzheimer's disease.

Aliens might be able to detect us from the radio signals we beam to Mars to control our rovers there. Astronomers have now listened in on the nearby TRAPPIST-1 system to check whether aliens are chattering between their own neighboring planets.

When it comes to life expectancy in high-income English-speaking countries, a new study has found that America has sat in last place since 2001. Australia remains the best performer and, the researchers say, should serve as a model for how the US can do better.

Researchers have identified an enzyme that's key to updating existing memories with new information, a process that declines naturally with age. Blocking the enzyme reduced memory impairment, opening the door to developing treatments for age-related memory problems.

A new technique may make it easier to selectively breed crop plants for better, deeper roots. The non-destructive process involves quickly checking a plant's leaves to see how far down its roots go into the soil.

In many cases nature has better versions of our tech. The newest example comes from a common insect in your backyard, which makes nanoscale soccer balls that hide it from predators – inspiring new, better UV protection and maybe even cloaking tech.

In a world first, researchers have printed multi-layered, living skin directly onto significant injuries in rats for scar-free skin repair. It's not sci-fi – they're genuinely 3D-printing skin (and possibly hair) right into damaged areas.