The fastest things ever made by humans are spacecraft, and the fastest spacecraft reached 330,000 mph – only 0.05% the speed of light. But there are ways to go faster.
Energy isn’t really made of anything else. It’s a kind of capacity to do things
LED face masks are popular with celebrities and promise a glowing complexion. But should they come with ‘daytime use’ recommendation?
UV lights come in a variety of different wavelengths, but not all are equally effective at disinfection. Researchers tested a number of commercially available lights to find the best.
Museum lighting standards assume galleries are still using incandescent bulbs or fluorescent lights. But LEDs offer more for both audiences and conservation.
Einstein was awarded a Nobel prize for his explanation for how light can be described as being made up of individual particles of energy under certain conditions.
By measuring how and when elephant seals sleep, researchers were able to figure out how elephant seals change their risk-taking behavior as they gain weight.
The presence of water on the Earth’s surface is the result of a subtle balance between different mechanisms in the atmosphere and below the surface.
Dark skies have value. They are a profoundly wonderful yet highly threatened natural asset.
For 60 years, physicists thought they knew exactly how coherent a laser could get. Now the ultimate quantum limit to laser coherence has been found, and it’s much much bigger than anybody thought.
Duckweed is the perfect space food: small, fast-growing and nutritious. By studying how light levels changed the production of radiation-fighting antioxidants, researchers made it even better.
Twisted sound beams suggest an advanced civilisation may be able to harness immense amounts of power from a black hole.
Physicists can use bright, hot lasers to slow atoms down so much that they measure -459 degrees Fahrenheit.
To boost your immune defenses against corona and other viruses, one of the most effective things you can do is maintain your natural circadian rhythms. Here’s how to do that.
A simple chemical reaction turns the red pigment of beets into a new, nontoxic blue dye.
Moths and insects cluster around lights at night. Why?
Long before Apple vs. Microsoft or Facebook vs. Google, there was Edison vs. Westinghouse.
Light bulbs can turn electricity into light (and a bit of heat) – an expert explains how they do it.
Just the tiniest bit of light can let you see in the 'dark.' Here's how your eyes do it.
Hardware could exploit the properties of scattered light so that computations happen at high speed and with low power consumption.