Black holes themselves emit no light, but the supermassive black holes at the centers of galaxies are often surrounded by huge clouds of material. It's this material, heated by friction and gravity as ...

The Sun is preparing for a major event: the reversal of its magnetic field. This phenomenon marks a turning point in the ...

And what does this mean for us as a species? During a pole reversal, Earth’s magnetic poles swap locations. Essentially, the ...

The sun undergoes such a reversal every 11 years, which marks an important stage in the solar cycle. The shift in polarity marks the point at which the sun is halfway through solar maximum ...

Your navigation system just got a critical update, one that happens periodically because Earth’s magnetic north pole keeps moving. Here’s what to know.

A vasectomy reversal undoes a vasectomy. A doctor attaches the two cut ends of the vas deferens back together so that you can ejaculate sperm again. If your partner has had a tubal ligation ...