Planet Earth

The rapid decline of the British-Irish Ice Sheet thousands of years ago may hold lessons for how melting ice sheets in Greenland and Antarctica will influence sea-level rise in the future.

Researchers have accurately measured the height of the eruption plume from the undersea volcano that erupted in Tonga in January. The results confirm that it is the tallest of its kind ever recorded.

Why does it cost $70,000 to scale Mount Everest?

Here's a look at when the time changes for daylight saving time and who instituted daylight savings in the first place.

A collapsed dam at a diamond mine in South Africa recently released a torrent of mining waste into the surrounding area. A new satellite image shows the trail of dried and potentially toxic mud left behind.

The discovery of a river beneath the Antarctic ice reveals that the bottom of the ice sheet may be more susceptible to melt than previously believed.

Here's why so many people die on Earth's highest peak.

So much trash and nowhere for it to go leads to a mountain of trash.

Massively long lines at Mount Everest's frigid summit may have contributed to the deaths of seven climbers this week.

Seasonal changes in air pressure sometimes make Mount Everest's "perceived elevation" to shrink by thousands of feet, a new study finds.

Declassified spy-satellite photos show that the glaciers near Mount Everest are shrinking more than expected.

Other mountains could be considered Earth's tallest; it just depends how you measure them.

The sharks are following micronekton, which travel from the surface to the depths at dawn.

A set of sinuous lines found in the Thar Desert of India may be the largest geoglyph ever discovered.