December 14, 2018, 8:21 a.m.
Certain conditions must be met for our eyes to see purple light in the sky.
December 11, 2018, 12:56 p.m.
In 'Ay, Mariposa,' conservation filmmakers highlight the people, animals, and fragile habitats impacted by the barrier.
December 6, 2018, 9:17 a.m.
Nicknamed the 'psychedelic Medusa,' this fascinating species was spotted during a NOAA research mission.
December 5, 2018, 8:21 a.m.
The British Ecological Society annual photography competition celebrates both flora and fauna.
December 4, 2018, 8:21 a.m.
From the geysers of Enceladus to the towering cliff face of Miranda, these celestial marvels are truly out of this world.
December 3, 2018, 9:35 a.m.
'Visiting different ecosystems is like getting to visit alien worlds.'
November 27, 2018, 9:15 a.m.
These plants are surprisingly common, yet just one taste — or even a touch — will send you to the hospital.
November 26, 2018, 4:15 p.m.
What's happening beneath Mars' surface? We're on the verge of finding out.
November 26, 2018, 10:31 a.m.
These epic landscapes will make you want to hop on the next plane to this Patagonian National Park.