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American Geophysical Union

Eos is a source for news and perspectives about Earth and space science, including coverage of new research, analyses of science policy, and scientist-authored descriptions of their ongoing research and commentary on issues affecting the science community.

What Goes Up Must Come Down: Movement of Water in Europa’s Crust

31 July 2025 @ 2:11 pm

Satellite photo of features on Europa.Using Earth’s glaciers as an analog, a new study explores the possibility of downward propagation of fractures and melt in Europa’s icy crust.

There’s a New Record for the Longest Lightning Flash

31 July 2025 @ 1:44 pm

A bolt of lightning against a dark blue sky.515 miles—roughly the distance from Washington, D.C. to Detroit, one-third the length of the Colorado River, and now, the longest lightning bolt ever recorded. That’s right: A new analysis of satellite data has revealed that a 22 October 2017 storm over the U.S. Midwest created a lightning bolt that reached 829 kilometers (515 miles), from eastern Texas to nearly Kansas City. The record-setting bolt lasted about 7 seconds.

Warming Winters Sabotage Trees’ Carbon Uptake

31 July 2025 @ 12:19 pm

A square research plot with no snow, surrounded by a snowy forestIn temperate forests, the biomass-building benefits of warmer growing seasons are offset by damaging variability in winter weather—a disparity that climate models may miss.

Three Magmatic Pulses Helped Rifting Transform into Seafloor Spreading

30 July 2025 @ 7:04 pm

Map from the studyA new geochronology of Mesozoic magmatism along the eastern margin of North America shows that continental breakup involved three distinct pulses of magmatism that localized extensional deformation.

When Rain Falls in Africa, Grassland Carbon Uptake Rises

30 July 2025 @ 2:05 pm

A woman carries a watering can on her head as she walks along a dirt path running between a crop field and natural vegetation.Satellite data suggest an explanation for the continent’s high year-to-year variability in carbon uptake.

Magnitude-8.8 Earthquake Strikes Western Pacific

30 July 2025 @ 1:42 pm

A map shows the levels of shaking intensity surrounding the epicenter of the 29 July earthquake near the Kamchatka Peninsula in Russia.One of the strongest earthquakes ever recorded struck off the eastern coast of Russia’s Kamchatka Peninsula Wednesday morning local time. Initially pegged at a magnitude-8.0, the quake was eventually upgraded to a magnitude-8.8. Adjusted magnitude estimates are not unusual for large earthquakes as more data become available.

Scientists Ask NSF to Keep Only Antarctic Icebreaker Afloat

29 July 2025 @ 1:46 pm

A large icebreaking ship docked in a shipyard among sea ice.On 28 July, more than 170 researchers sent a letter to National Science Foundation leaders and Congress, urging them to reconsider the decision to terminate the lease of the Nathaniel B. Palmer, the United States’ only Antarctic research vessel-icebreaker (RVIB) and a key part of science operations around the White Continent.

Southern Ocean Salinity May Be Triggering Sea Ice Loss

29 July 2025 @ 12:42 pm

Cracked sea ice seen from aboveNew satellite technology has revealed that the Southern Ocean is getting saltier, an unexpected turn of events that could spell big trouble for Antarctica.

Verdaderas soluciones climáticas están debajo de nosotros

29 July 2025 @ 12:39 pm

Primer plano de una veta blanca de calcita en roca basáltica gris con una pequeña planta sobre la roca.Es momento de aceptar que el almacenamiento duradero de carbono en el subsuelo, junto con la reducción de emisiones, debe ser parte del plan para mitigar los efectos del cambio climático, y las geociencias deben desempeñar un papel central.

Why Crop Yield Decreases at High Temperatures

29 July 2025 @ 12:00 pm

Photo of a corn field.Scientists find that water stress drives the connection between surface temperature and crop yield loss, providing information to help improve predictions of agricultural productivity under climate change.