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Pleistocene

Field photo of a mountainous region covered with long grass and shrubs.
Posted inEditors' Highlights

Elementary, My Dear: Al & Be Give Evidence of Past Climate Change

by Mikaël Attal 14 November 202412 November 2024

10Be and 26Al concentrations in river sand reveal an increase in erosion rate in the Brazilian Highlands consistent with the Mid-Pleistocene Transition, a major climatic shift that occurred about 1 million years ago.

A glacier between two dark-colored mountains. A snowy mountain reaching up into the clouds is in the background, and blue seawater is in the foreground.
Posted inResearch Spotlights

A Million Years Without a Megaslide

by Rebecca Owen 19 April 202419 April 2024

A new study goes deep into the Gulf of Alaska to examine the sixth-largest underwater landslide and investigate why a similar event hasn’t happened since.

A creek with tufts of grass growing in it winds through a rocky landscape
Posted inNews

Water Corridors Helped Homo sapiens Disperse out of Africa

Katherine Kornei, Science Writer by Katherine Kornei 2 November 20232 November 2023

Wetland conditions during the last interglacial period in parts of the Levant helped propel our ancestors into Arabia, new research suggests.

Photo of an ocean with snow-capped mountains in the background.
Posted inEditors' Vox

Marine Sediments Reveal Past Climate Responses to CO2 Changes

by Sze Ling Ho and Erin McClymont 21 September 202320 September 2023

Climate records stored in marine sediments reveal different ice sheet and ocean responses to falling atmospheric CO2 concentrations from the warm Pliocene to the ice ages of the Pleistocene.

Two graphs from the paper.
Posted inEditors' Highlights

Pliocene Conveyer Belt in the Pacific

by Vincent Salters 6 September 20237 September 2023

Ocean Drilling Program cores and helium isotopes put better constraints on the ocean circulation in the north Pacific.

Illustration of early hominins arriving in a multibiome mosaic landscape
Posted inNews

Humans Adapted to Diverse Habitats as Climate and Landscapes Changed

by Deepa Padmanaban 10 July 202331 October 2023

Long-term changes in Earth’s climate affected the dispersal of human ancestors and their adaptation to diverse habitats, a new study finds.

A thick, wide expanse of whitish-bluish ice encroaches on what appears to a field of grass.
Posted inNews

Precession Helped Drive Glacial Cycles in the Pleistocene

Katherine Kornei, Science Writer by Katherine Kornei 11 July 20223 July 2023

By studying bits of rock scooped up by ancient glaciers, researchers have pinned down that recent glacial variability was driven, in part, by changes in the direction of Earth’s axis of rotation.

Gyldenlove Glacier discharges into a fjord in southern Greenland.
Posted inNews

“Sticky” Ice Sheets May Have Led to More Intense Glacial Cycles

by Clara Chaisson 5 January 20222 July 2024

New research attributes a shift to longer, stronger glacial cycles to increased friction between ice sheets and bedrock in the Northern Hemisphere 1 million years ago.

Aerial or satellite image of ancient riverbeds.
Posted inNews

The “Green Sahara” Left Behind Fossil Rivers

by Munyaradzi Makoni 10 December 20213 July 2023

Reconstruction reveals how people living along the banks of the Nile may have relocated as climate changed and flooding increased during the African Humid Period.

Mountain peaks through the ice cover on Thurston Island off of western Antarctica.
Posted inEditors' Vox

Exploring the Dramatic Shift in Ice Age Duration

by C.J. Berends, R. van de Wal and L.J. Lourens 28 July 20213 July 2023

Scientists are still seeking an explanation for the Mid-Pleistocene Transition when ice ages became longer in duration and exploring what it may mean for future climate change.

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