Because it doesn't interreact with light or electromagnetism, dark matter exists to us only through its influence on visible ...

Is it possible to understand the Universe without understanding the largest structures that reside in it? In principle, not ...

Colliding galaxy clusters MACS J0717+3745, more than 5 billion light-years from Earth. Background is Hubble Space Telescope image; blue is X-ray image from Chandra, and red is VLA radio image.

How Blue Light May Affect Your Mental Health Scientists think nighttime exposure to blue light throws off your circadian rhythm , or sleep/wake cycle. This could lead to symptoms of depression.

The light from our devices is “short-wavelength-enriched,” meaning it has a higher concentration of blue light than natural light—and blue light affects levels of the sleep-inducing hormone ...

Ray-Ban Round Blue-light Clear Evolve Glasses, $184. Ray Ban's new blue light-blocking glasses help keep your eyes protected when you're working or scrolling through your phone.

Artificial blue light from devices and screens is not kind on your eyes or your overall health. Here are the best blue light blocking glasses that we recommend.