The next wearable health metric you'll obsess over may be your brain's actual level of focus.
The Lyrid displays will peak later today and continue until April 26.
Astronomers watched as the supergiant WOH G64 reshaped itself into a different type of star.
Decades in the making, NASA's X-ray timelapse shows a stellar explosion expanding into space at up to 2% the speed of light.
The ancient stellar death took place when the universe was a mere 730 million years old.
