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Researchers searching for a hypothetical fourth type of neutrino have found no evidence for the particle, according to a new study. Very low-mass and highly abundant, neutrinos are elementary particles that barely interact with the rest of matter.…

With a miniature version of the kind of television antennas that often adorned rooftops before the advent of satellite and cable TV, researchers have demonstrated the conversion of electrical signals into light beamed in a particular direction. This…

A new study has shown that dangerous hydrogen-burning flames can persist in unexpectedly narrow spaces and with very low fuel volumes. The findings highlight potential challenges involved in the safe storage and transport of hydrogen gas, which…

Famously durable, diamond is the hardest natural substance that occurs in any significant abundance on Earth. Yet according to a new study, on the nanoscale—a scale size of just billionths of a meter—diamond can, in fact, be bent and deformed. This…

For the first time, researchers have measured a process that occurs in mere zeptoseconds, or trillionths of a billionth of a second (10-21 seconds). The process is the transit of a light particle, or photon, across the two atoms that compose a…

Physicists recently reported the first indication of asymmetry in the behaviors of neutrinos and antineutrinos—subatomic particles that have zero electric charge and interact with matter almost entirely through the weak nuclear force. This type of…

Using old data from the NASA spacecraft MESSENGER, researchers have demonstrated how to measure the average lifetime of a neutron from space. This finding is important because, despite decades of efforts, physicists still cannot definitively say how…

The supermassive black hole at the center of the Milky Way serves as a unique laboratory for testing predictions of general relativity. In a new study, researchers report that a long-studied star—called S2 or sometimes S-02—moves in a rosette-shaped…

Stellar explosions known as supernovae may be behind several anomalous rises in radiocarbon captured in tree rings over the past 40,000 years, according to a recent study that adds mounting evidence to the hypothesis that supernovae can impact…

A form of ultraviolet (UV) light holds promise as an innovative way to neutralize airborne SARS-CoV-2 particles and other viruses, potentially helping slow the COVID-19 pandemic that, to date, has caused over 1.3 million deaths globally. More…