Videos from Yosemite National Park show the iconic "Firefall" phenomenon glowing at Horsetail Fall inside the park.

This is the best time of year to try challenging L.A. hikes, while it's cool out. Not only will they offer some great views ...

Researchers have found that stars in the early universe may have formed from 'fluffy' molecular clouds. Using the ALMA telescope to observe the Small Magellanic Cloud -- whose environment is similar ...

Stars are born in dense molecular clouds, but did they always form this way? Recent research suggests that in the early ...

Mars is often seen as a barren, rust-colored wasteland, but NASA’s Curiosity rover has just revealed a surprising burst of ...

Hawaii offers endless alternatives for images due to its varied landscapes and thriving ecosystems. Every island has something special to provide each professional and amateur photographer, from the ...

Researchers analysed 100 locations to find the best spots. A 'Sunset Score' was created for each place based on cloud ...

Arctic daily sea ice extent continued to hover near record daily lows in January, with the ice edge well northward of its long-term average position in most areas. In contrast to the cold conditions ...

The clouds, composed of carbon dioxide ice crystals, glow in shades of red, green, and pearlescent hues in the martian ...

Unusually Red or Purple Sunsets and Sunrises One of the most enchanting sights in nature is a vividly red or purple sky ...

The iridescent cloud reveals new clues about ice formation in the Martian atmosphere (no little green men, sorry).