The 2007 climate report was wrong about Himalayan glaciers: They will not disappear soon, says a 2014 report. But what do we know that we didn't know then?
A quarter of a billion years ago Africa slammed into North America and left a scar that can be seen today with special instruments.
The Khumbu Icefall is a chaotic jumble of house-sized ice boulders set with a hair trigger that must be traversed to climb the world's highest mountain.
New research into the height of a very remote Andean plateau reveals just the latest surprise from the Earth's second-greatest mountain belt.
New modeling of the Pluto-Charon system give good reasons to suspect that the surface of Pluto will be riddled with faults caused in part from a liquid ocean that once lie hidden under the icy surface.
New work shows how the highest mountain range in the world is not so much a tectonic train wreck as a shuffled pile of crumbly crustal dominoes.
Some of Mars' lava fields may actually be massive mud flows, indicating that they weren't created by ancient volcanic activity at all.
The latest U.N. report shows climate change is here -- and its effects will grow. So why haven't we done more?
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