From new exoplanetary neighbors and a weakening dark energy to the best evidence for life on Mars and an interstellar comet ...

Ready for the perfect road trip or some daydreaming fodder? Embrace the majesty of America with a look at the prettiest lake ...

One giant spider has been observed on Jupiter's moon Europa, sitting right in the middle of its largest crater. Scientists ...

From natural pools in desert canyons to mineral-rich thermal springs with valley views, these are our favorite hot springs and swimming holes in Arizona.

Researchers are exploring whether the spider-like feature in Europa’s Manannán crater was formed in a similar manner to Earth’s lake stars.

It’s the greatest cosmic murder mystery of the year: How did a black hole destroy a star—and what kind of black hole is the culprit? Normally, so-called “gamma ray bursts,” sudden flashes of extremely ...