When an object moves extremely fast—close to the speed of light—certain basic assumptions that we take for granted no longer apply. This is the central consequence of Albert Einstein’s special theory of relativity. The object then has a different length than when it is at rest, and time passes differently for the object than it […]
Infinity has always been one of the most fascinating and perplexing concepts in mathematics. For ancient Greek mathematicians, it was (in a similar way to the notion of zero) something like a non-concept, i.e., something that one was not allowed to think, and only might express and use by means of circumloquia at the best […]
In the quest to unravel the mysteries of the universe, scientists are turning to tiny glowing molecules and powerful microscopes to detect elusive particles. Two groundbreaking studies, one published in ACS Sensors in 2025 and another in Nature Communications in 2024, showcase innovative approaches to detecting barium ions in high-pressure xenon gas. These advancements are […]
Understanding the origin of heavy elements on the periodic table is one of the most challenging open problems in all physics. In the search for conditions suitable for these elements via “nucleosynthesis,” a Los Alamos National Laboratory-led team is going where no researchers have gone before: the gamma-ray burst jet and surrounding cocoon emerging from […]
Magnetrons are high-power vacuum tubes conceived more than a century ago to produce microwaves. Their working principle involves the interaction of a cloud of electrons jumping from the cathode to the anode of the device together with a magnetic field. This spinning electron cloud trajectory induces electromagnetic fields in several resonant cavities at a certain […]
Author: Jonathan Simone, Adjunct Professor of Biological Sciences, Brock University On May 20, 1875, delegates from a group of 17 countries gathered in Paris to sign what may be the most overlooked yet globally influential treaty in history: the Metre Convention. At a time when different countries (and even different cities defined weights and lengths […]
A new study suggests the universe may rotate—just extremely slowly. The finding could help solve one of astronomy’s biggest puzzles. Current models say the universe expands evenly in all directions, with no sign of rotation. This idea fits most of what astronomers observe. But it doesn’t explain the so-called Hubble tension—a long-standing disagreement between two […]
Have you ever found yourself spending five minutes talking to someone and suddenly using their words instead of your own? Say, for example, that you usually say “couch” but now suddenly you call it “sofa.” You say “TV,” but suddenly it’s “the telly.” You’ve never in your life referred to dinner as “tea” but after […]
Author: Cédric M. John, Professor and Head of Data Science for the Environment and Sustainability, Queen Mary University of London Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese researchers have made a compelling case that Earth’s oceans were once green, in […]
An international team of scientists has, for the first time, directly observed catalysis in-action at the atomic level. In mesmerizing new videos, single atoms move and shake during a chemical reaction that removes hydrogen atoms from an alcohol molecule. By viewing the process in real time, the researchers discovered several short-lived intermediate molecules involved in […]