Scientists recently studied the formation of the huge crystals inside the giant geode of Pulpí, located deep in a Spanish mine. They revealed the natural process that grew the crystals, ripening them over thousands of years and making them literally crystal clear.

Three spooky Halloween animals see better at night than we do. Here’s how they do it.

Eerie denizens of the ocean depths star in this video from the Monterey Bay Aquarium Research Institute.

What kicked off a rapid cooling on Earth 12,800 years ago? Some geologists believe a fragmented comet or asteroid collided with Earth and caused the change. Read more from a scientist whose fieldwork at a South Carolina lake adds to the growing pile of evidence.

The European Space Agency was asking this question late last week, as multiple fires burned across the globe. Read more about 2019 fires, and fire-tracking via satellite, here.

Biologists report that the white bellbird, which lives in the mountains of the Amazon, has shattered the record for the world's loudest bird.

NOAA has issued its winter 2019-2020 outlook for temperature, precipitation and drought for the US, including Alaska and Hawaii.

A 2016 study suggested tall ice cliffs along Antarctica's coast might collapse rapidly under their own weight and contribute to more than 6 feet of sea-level rise by 2100. Now, MIT researchers have found this prediction may be overestimated.

After a near-miss with extinction, a population of humpback whales in the South Atlantic has rebounded.

Thanks to abnormal weather patterns in the upper atmosphere over Antarctica, this year's ozone hole is the smallest since the ozone hole was 1st observed in 1982.