Rocks and minerals don’t simply reflect light. They play with it and interact with light as both a wave and a particle.
Time gets a little strange as you approach the speed of light.
From a photon's viewpoint, the Universe is timeless and dimensionless.
With LEDs bringing brighter nighttime lighting than ever before, and thousands of new satellites polluting the skies, astronomy needs help.
In 2017, a kilonova sent light and gravitational waves across the Universe. Here on Earth, there was a 1.7 second signal arrival delay. Why?
Light can be turned into heat, which can then be turned into motion, and the effect of that motion can be turned into a big squeeze.
Light carries with it the secrets of reality in ways we cannot completely understand.
The concept of ‘relativistic mass’ has been around almost as long as relativity has. But is it a reasonable way to make sense of things?
A concept known as "wave-particle duality" famously applies to light. But it also applies to all matter — including you.
Some processes, like quantum tunneling, have been shown to occur instantaneously. But the ultimate cosmic speed limit remains unavoidable.
Since dark matter eludes detection, the mission will target sources of light that are sensitive to it.
Finding a tiny planet around bright stars dozens or hundreds of light-years from Earth is extremely difficult.
In a distant galaxy, a cosmic dance between two supermassive black holes emits periodic flashes of light.
Even with quantum teleportation and the existence of entangled quantum states, faster-than-light communication still remains impossible.
The Universe, although violent, is filled with creation events following destructive ones. 1850 light-years away, both types are unfolding.
The first-of-its-kind approval could change how we think about gene-edited foods.
Eyes with lower pigment (blue or grey eyes) don’t need to absorb as much light as brown or dark eyes before this information reaches the retinal cells. This might provide light-eyed people with some resilience to SAD.
How the simple act of watching twilight can radically transform our perception of the world and our role within it.
Nothing can escape from a black hole. So where do Hawking radiation, relativistic jets, and X-ray emissions around black holes come from?
Our brainwaves naturally synchronize with external stimuli like flickering lights. Here's how the phenomenon might boost learning.
At 1,600 light years away, the black hole is practically in our cosmic backyard.
There's a quantum limit to how precisely anything can be measured. By squeezing light, LIGO has now surpassed all previous limitations.
Everything everywhere all at once.
Across all wavelengths of light, the Sun is brighter than the Moon. Until we went to the highest energies and saw a gamma-ray surprise.