planet-earth69.54 min read
Massive freshwater layer found beneath Great Salt Lake could reshape Utah's water future
11 days ago•Source: Live Science
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68.125 min•21 days ago
Humans Are Slowing Earth's Spin at a Record Pace, Study Finds
New research ties climate-change–driven sea-level rise to a record-fast lengthening of Earth's day: about 1.33 milliseconds per century today, with warming scenarios predicting up to 2.62 milliseconds per century by 2080. While the Moon’s gravity, glacial rebound, and winds modulate the effect, the human-caused signal is growing; past day lengths were inferred from fossil foraminifera. The current rate is among the fastest in 3.6 billion years and could affect precise timekeeping and spacecraft navigation in the future.
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Drought paradox: Colorado River plants siphon groundwater, trimming river flows
Live Science•23 days ago
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El Niño's heat surge meets Starlink's 10,000-satellite milestone
Live Science•24 days ago
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China’s forest hides Earth's youngest major crater
A 1.15-mile-wide, incomplete crater in Heilongjiang, China—the Yilan crater—is believed to be the youngest major impact structure on Earth, dating roughly 46,000–53,000 years ago. Discovered in 2021 after forest cover concealed it, the ringed feature is the largest known crater of its age and could be younger than Barringer Crater, though age estimates remain uncertain.
Coastal Deserts: Why Seas and Sand Meet in Arid Belts
Coastal deserts form where cold ocean currents chill the air and fog limits moisture, while nearby mountains create rain shadows that block precipitation, producing arid zones right along shores (as seen in the Namib and Atacama).
Ancient Asgard archaea may have used oxygen long before Earth’s oxygenation reshaped life
A Nature study analyzing deep-sea sediments found Heimdallarchaeia genomes with components of aerobic respiration, suggesting Asgard archaea could tolerate and potentially use oxygen long before Earth’s oxygenation, providing metabolic groundwork for the archaeal–eukaryotic merger that gave rise to complex life.
Zimbabwe's 2.5-Billion-Year Great Dyke Captured in Space Image
A 2010 astronaut photo from the ISS highlights the Great Dyke of Zimbabwe—a 342-mile-long, 2.5-billion-year-old lopolith rich in platinum, chromite and other metals—making it one of Earth's oldest and most mineral-rich igneous intrusions and a major mining hotspot along its length.
Desert turns forest, Viking giant, and dream inception: this week's science headlines
This week’s science roundup covers China’s Great Green Wall turning the Taklamakan Desert into a carbon sink and related emissions trends, a Viking Age mass grave near Cambridge that includes the skeleton of a towering man who may have undergone trepanation, a study showing that dreams can be subtly seeded to boost problem-solving, and a nature-made Valentine’s gift idea tied to a pink salt lake in Argentina, along with other climate, archaeology and space-related science news.
Dormant deep-Earth microbes may wake after millions of years
A Live Science feature explores 'intraterrestrials'—microbes living deep in Earth's crust that can remain dormant for hundreds of thousands to millions of years. Scientists propose these organisms may awaken only when slow geological processes bring them back to nutrient-rich surface environments, raising questions about Darwinian evolution in nongrowing life and suggesting long-term dormancy could offer a selective advantage (GASP) as they wait for events like island subsidence, volcanic activity, or plate movement to “reawaken” them.
Morocco wrinkle fossils hint at chemosynthetic life deep beneath ancient seas
Scientists found wrinkle-like fossil imprints in 180-million-year-old turbidites in Morocco's Central High Atlas, likely formed by ancient chemosynthetic microbial communities rather than photosynthetic life, suggesting deep-water habitats preserved in rocks may hold clues to early life and expanding where researchers search for oldest microbial life.
Country-shaped magnetic anomaly reveals buried geology beneath Northern Territory
Advanced modeling of magnetic data from Australia’s Northern Territory has uncovered a large magnetic anomaly shaped like the country, revealing buried geological boundaries and structures (faults, folds, basins) that conventional maps missed. Led by CSIRO researchers, the work refines the 1999 Bonney Well Survey data with a new gridding algorithm, producing clearer imagery and offering clues about Australia’s geological history and potential mineral resources, including hidden features exposed at the surface in the Hatches Creek Formation dating to 2.5–1.6 billion years ago.
Iron-rich mantle 'mega-blob' beneath Hawaii may power the hotspot
A new study combining P- and S-waves finds a massive, iron-rich, solid mega-ultralow velocity zone beneath Hawaii, which could anchor and fuel the Hawaiian hotspot by concentrating heat and guiding mantle flow.
Ancient mantle drip let the Green River flow uphill through the Uintas
Geologists propose that a deep mantle “lithospheric drip” under the Uinta Mountains lowered the range, allowing the Green River to carve an uphill route through the Uintas about 8 million years ago. The mountains later rebounded after the drip detached from the mantle around 2–5 million years ago, enabling the canyon and current river path (including the Canyon of Lodore) to form. The idea is supported by seismic-imaging data and landscape modeling, and is published in the Journal of Geophysical Research: Earth Surface.