News
Mud beneath Antarctic ice reveals millions of years of ice retreat
8+ hour, 15+ min ago (1134+ words) Out on the edge of the West Antarctic Ice Sheet, a group of scientists spent weeks living in tents on wind-packed snow, working shifts day and night. They weren't searching for wildlife or claiming territory " they were drilling deep beneath…...
How Earth’s climate suddenly changed 2.7 million years ago
1+ day, 2+ hour ago (842+ words) About 2.7 million years ago, Earth's climate reached a tipping point that transformed a stable world into one marked by ice ages and abrupt swings. The planet moved from a mostly warm and steady climate to a colder and far more…...
How a wet Amazon helped slow sea level rise, at least temporarily
1+ day, 5+ hour ago (904+ words) After a sharp jump in 2024, the oceans rose much more slowly the following year " even as global temperatures and ocean heat kept climbing. That raised an obvious question: If the planet is still warming, why did sea level rise take…...
Earthquakes may 'boomerang' back and hit the same area twice
2+ day, 2+ hour ago (1124+ words) Earthquakes usually tear along a fault in one direction (or two) and keep going. But in rare cases, the rupture can reverse course, sending a second wave of breaking back through ground it already shook just moments earlier. New research…...
Volcanoes weren’t the only force behind Earth’s ancient carbon swings
3+ day, 2+ hour ago (1022+ words) Volcanoes are often blamed as Earth's main natural source of carbon dioxide. But a new reconstruction of the past 540 million years suggests that for most of deep time, they weren't. Instead, spreading ridges and rifting continents released more carbon, while…...
Antarctica’s ‘gravity hole’ grew stronger as the continent froze
4+ day, 4+ hour ago (1036+ words) Gravity feels like the one thing that never changes. But it does change a little from place to place. And after you account for Earth's rotation, the weakest gravity on the planet sits beneath Antarctica. Scientists sometimes call this a…...
What is iron ore?
4+ day, 22+ hour ago (762+ words) Iron ore describes any rock or mineral deposit that contains enough metallic iron to make extraction worthwhile. These rocks appear in a surprising spectrum of colors. Some glow rusty red or deep purple, while others show striking yellow or dark…...
Kīlauea earthquake may suppress fault activity for decades
5+ day, 6+ hour ago (855+ words) K'lauea is known for fire and motion. Lava flows, ground cracks, and steady rumbling come with the territory. But deep under the volcano's south flank, something quieter has been missing since 2018. A slow, steady type of fault movement that once…...
Megadrought forced ancient Polynesians to venture into the seas
6+ day, 3+ hour ago (848+ words) Rainfall records from across the South Pacific have revealed that western Polynesian homelands dried while islands farther east grew wetter about 1,000 years ago." That uneven shift in freshwater availability aligns with the last major wave of eastward settlement, reframing those…...
Math trick speeds up seismic calculations to transform earthquake preparedness
6+ day, 4+ hour ago (796+ words) A new mathematical shortcut has cut the core calculations inside earthquake ground-shaking simulations by about 1,000 times without sacrificing accuracy. That leap in speed could make it far easier for scientists and cities to model how strongly the ground would shake…...