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The high-up mesosphere is too thin for airplanes or balloons to support themselves. Light heats the underside of the mylar film and lifts the flier using recoil energy. Scientists from the University of Pennsylvania have made “microfliers” that could fly into near space on just the power of light. These tiny fliers may be the key to unlocking the mesosphere, the area 30 to 50 miles above Earth where the air is too thin to physically support hot air balloons or airplanes. The solar-powered fliers could fill a critical gap—not just in Earth’s understudied mesosphere, but elsewhere in s...

In a new study, scientists say they can explain dark matter by positing a particle that links to a fifth dimension. Here's what that means.

For the first time in decades, scientists have finally captured the elusive element Einsteinium, making enough of it to do experiments.

The secret is in tiny localized time variations, possibly caused by neutrinos. The theory is far out, but the findings will help other scientists. test a quantum theory that flips our understanding of time on its head. Physicist Joan Vaccaro first articulated the divisive "quantum theory of time"—that "dynamics may be a phenomenological consequence of a fundamental violation of time reversal symmetry," in her words—a few years ago. But now, researchers can use neutrinos and antineutrinos to measure the passage of time within a powerful nuclear reactor. Vaccaro has been open about the the...

Scientists from the Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM in Dresden made the sludgy gray paste, which heats hydrogen with magnesium and stabilizers so the hydrogen can be stored in cartridges even at room temperature. That's it in the photo above. What results is a stable medium that its makers say is 10 times more energy-dense than lithium-ion batteries, “When it comes time to release the energy, a plunger mechanism extrudes the paste into a chamber where it reacts with water to release hydrogen at a dynamically controlled rate, which then feeds a ...