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Mass Extinctions of Land-Dwelling Animals Occur in 27-Million-Year Cycle

Dec. 11, 2020 — Mass extinctions of land-dwelling animals--including amphibians, reptiles, mammals, and birds -- follow a cycle of about 27 million years, coinciding with previously reported mass extinctions of ...

What Caused the Ice Ages? Tiny Ocean Fossils Offer Key Evidence

Dec. 10, 2020 — Since the discovery that atmospheric carbon dioxide (CO2) concentrations were lower during past ice ages, the cause has been a mystery. Now, fossils of ocean algae reveal that a weakening in ...

Newly Discovered Greenland Plume Drives Thermal Activities in the Arctic

Dec. 7, 2020 — A team of researchers understands more about the melting of the Greenland ice sheet. They discovered a flow of hot rocks, known as a mantle plume, rising from the core-mantle boundary beneath central ...

Cluster of Alaskan Islands Could Be Single, Interconnected Giant Volcano

Dec. 3, 2020 — A small group of volcanic islands in Alaska's Aleutian chain might be part of a single, undiscovered giant volcano, say scientists. If the researchers' suspicions are correct, the newfound volcanic ...

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Last Interglacial: Warming Amplified in Mountain Environments

Dec. 11, 2020 — Speleothems turned out to be a great stroke of luck: dripstones from two caves in the Swiss Alps provide for the first time a continuous reconstruction of temperatures during the Last Interglacial ...

Why Do Elephants and Tigers Still Roam in India? Study Offers Clues

Dec. 8, 2020 — A study documenting four extinctions of large mammals on the Indian Subcontinent sheds light on why elephants, tigers, and rhinos still roam ...

New Geological Findings from Eastern Fennoscandia Add New Dimensions to the History of European Ice

Dec. 7, 2020 — In Finland, the majority of the glacial and warm interval records have been interpreted to represent only the last, Weichselian, glacial cycle that ...

The Climate Changed Rapidly Alongside Sea Ice Decline in the North

Dec. 4, 2020 — Researchers have shown that abrupt climate change occurred as a result of widespread decrease of sea ice. This scientific breakthrough concludes a long-lasting debate on the mechanisms causing abrupt ...

New Theory on 'Venus' Figurines

Dec. 1, 2020 — One of world's earliest examples of art, the enigmatic `Venus' figurines carved some 30,000 years ago, have intrigued and puzzled scientists for nearly two centuries. Now a researcher believes he's ...

How Stable Is the Antarctic Ice Sheet?

Nov. 30, 2020 — As temperatures rise due to climate change, the melting of polar ice sheets is accelerating. An international team of scientists has now examined the dynamics of the East Antarctic Ice Sheet more ...

Ice Sheets on the Move: How North and South Poles Connect

Nov. 25, 2020 — Over the past 40,000 years, ice sheets thousands of kilometers apart have influenced one another through sea level changes, according to new research. New modelling of ice sheet changes during the ...

Geoscientists Discover Ancestral Puebloans Survived from Ice Melt in New Mexico Lava Tubes

Nov. 18, 2020 — New study explains how Ancestral Puebloans survived devastating droughts by traveling deep into the caves of New Mexico to melt ancient ice as a ...

Study Reconstructs Ancient Storms to Help Predict Changes in Tropical Cyclone Hotspot

Nov. 16, 2020 — New research reveals that tropical cyclones were actually more frequent in the southern Marshall Islands during the Little Ice Age, when temperatures ...

A Jigsaw Puzzle Made of Ancient Dust

Nov. 9, 2020 — During the last Ice Age about 20,000 years ago, iron-containing dust acted as a fertilizer for marine phytoplankton in the South Pacific, promoting carbon dioxide sequestration and thus the glacial ...