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New research demonstrates connections between climate change and civil unrest among the ancient Maya

Posted on July 19, 2022
New research demonstrates connections between climate change and civil unrest among the ancient Maya

An extended period of turmoil in the prehistoric Maya city of Mayapan, in the Yucatan region of Mexico, was marked by population declines, political rivalries and civil conflict. Between 1441 and 1461 CE the strife reached an unfortunate crescendo — the complete institutional collapse and abandonment of the city. This all occurred during a protracted…

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Americas, Archaeology, Central America, Climate Change, Mexico

Evolving to outpace climate change, tiny marine animal provides new evidence of long-theorized genetic mechanism

Posted on July 14, 2022
Evolving to outpace climate change, tiny marine animal provides new evidence of long-theorized genetic mechanism

Some copepods, diminutive crustaceans with an outsized place in the aquatic food web, can evolve fast enough to survive in the face of rapid climate change, according to new research that addresses a longstanding question in the field of genetics. Several species of copepods and one ostracod are shown here [Credit: NOAA] Barely more than…

Read More “Evolving to outpace climate change, tiny marine animal provides new evidence of long-theorized genetic mechanism” »

Climate Change, Evolution, Genetics

New study shows how the ancient world adapted to climate change

Posted on June 28, 2022
New study shows how the ancient world adapted to climate change

A new study of the ancient world of Anatolia—now Turkey—shows how they adapted to climate change but offers a warning for today’s climate emergency. Maps of the study region: These were created in QGIS using the ASTER Global Digital Elevation Model v3 as a basemap [13]: (a) All TIB 8 settlements, with elevation data displayed using…

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Archaeology, Climate Change, Near East, Turkey

Droughts in the sixth century paved the way for Islam

Posted on June 16, 2022
Droughts in the sixth century paved the way for Islam

Extreme dry conditions contributed to the decline of the ancient South Arabian kingdom of Himyar. Researchers from the University of Basel have reported these findings in the journal Stalagmite from the Hoti Cave. Holes are created by sampling for radioactive dating, and scratch marks by sampling for isotope analysis [Credit: Timon Kipfer, University of Basel] On…

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Climate Change, Earth Science, Middle East, Palaeoclimate, Palaeontology, Yemen

Race to save undersea Stone Age cave art masterpieces

Posted on May 30, 2022
Race to save undersea Stone Age cave art masterpieces

To reach the only place in the world where cave paintings of prehistoric marine life have been found, archaeologists have to dive to the bottom of the Mediterranean off southern France. Cosquer Cave lies under the sea in a landscape of limestone near Marseilles [Credit: © Luc Vanrell] Then they have to negotiate a 137-meter…

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Archaeology, Climate Change, Europe, France, Heritage, Ticker, Western Europe

Decline of diatoms due to ocean acidification

Posted on May 25, 2022
Decline of diatoms due to ocean acidification

While calcifying organisms like oysters and corals have difficulty forming their shells and skeletons in more acidic seawater, diatoms have been considered less susceptible to the effects of ocean acidification — a chemical change triggered by the uptake of carbon dioxide (CO2). The globally widespread tiny diatoms use silica, a compound of silicon, oxygen and…

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Climate Change, Endangered Species, Environment, Natural Heritage, Oceans

Discovery of ‘ghost’ fossils reveals plankton resilience to past global warming events

Posted on May 20, 2022
Discovery of ‘ghost’ fossils reveals plankton resilience to past global warming events

An international team of scientists from UCL (University College London), the Swedish Museum of Natural History, Natural History Museum (London) and the University of Florence have found a remarkable type of fossilisation that has remained almost entirely overlooked until now. The images show the impressions of a collapsed cell-wall covering (a coccosphere) on the surface…

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Ancient Environment, Climate Change, Earth Science, Fossils, Oceans, Palaeoclimate, Palaeontology

Climate change reveals unique artifacts in melting ice patches

Posted on May 19, 2022
Climate change reveals unique artifacts in melting ice patches

One day more than 3000 years ago, someone lost a shoe at the place we today call Langfonne in the Jotunheimen mountains. The shoe is 28 cm long, which roughly corresponds to a modern size 36 or 37. The owner probably considered the shoe to be lost for good, but on 17 September 2007 it…

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Archaeology, Climate Change, Europe, Heritage, Northern Europe, Norway

Environment scientists close in on ‘golden spike’ to define Anthropocene

Posted on May 19, 2022
Environment scientists close in on ‘golden spike’ to define Anthropocene

Leicester researchers searching for a ‘golden spike’ to formally define humanity’s current geological period — and acknowledge human impact on our planet — have announced a major step in their analysis at an international conference on Wednesday. Amur River clams recovered from San Francisco Bay [Credit: Stephen Himson] University of Leicester Professors Jens Zinke, Mark…

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Biodiversity, Climate Change, Endangered Species, Environment, Natural Heritage

Algae reveal clues about climate changes over millions of years

Posted on May 13, 2022
Algae reveal clues about climate changes over millions of years

Organisms adjust their cell walls according to environmental conditions such as temperature. Some adaptations involve changes in lipids which may still be preserved long after the rest of the organisms has been degraded. Researchers at the University of Gottingen studied a specific group of lipids called long chain diols which are found in sea sediments…

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Climate Change, Earth Science, Genetics, Oceans, Palaeobiology, Palaeoclimate, Palaeontology

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