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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 ...

ELIJAH NOUVELAGEGetty Images What Is Liquid Nitrogen, and What Is It Used For? Nitrogen gas makes up roughly 78 percent of Earth's atmosphere by volume, according to the Royal Society of Chemistry. The element, discovered in 1772 by Daniel Rutherford, is a critical building block of all life on Earth and plays a key role in plant growth. When cooled to -320 degrees Fahrenheit, the gas turns into an ultra-chilly liquid. Polish professors Zygmunt Wróblewski and Karol Olszewski became the first to successfully liquify nitrogen in 1883. Just 15 years later, the British scientist James Dewar dev...

NASA At the request of President Joe Biden, a moon rock is now on display in the Oval Office. Lunar sample 76015,143 is a remnant from a violent asteroid impact on the moon’s surface. Astronauts collected the sample during Apollo 17, the final mission to the moon. As President Joe Biden took the oath of office on the steps of the Capitol building on Wednesday, White House staffers busily prepared the Oval Office for his arrival. They added a bust of Caesar Chavez behind the resolute desk, swapped out one set of gold curtains for another, and replaced a portrait of Andrew Jackson with that...