Third Quarter 2023----Chinese Academy of Sciences

English.cas.cn

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Early Ancestral Bottleneck Could've Spelled the End for Modern Humans
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Monitoring of Radio Galaxy M87 Confirms Black Hole Spin
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Canadian Wildfires Produce Catastrophic Carbon Emissions This Year
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Chinese Paleontologists Find New Fossil Link in Bird Evolution
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Martian Dunes Eroded by a Shift in Prevailing Winds after the Planet's Last Ice Age

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Earth's Oldest-known Rocks Provide Clues About Early Tectonics
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Astronomers Discover Forming Quadruple-star System: More Intimate, More Complex
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Scientists Use FAST to Discover a New Population of 'Dwarf' Pulses
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Fossil Unveils Leaf Eating Among Earliest Birds
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Global Warming Will Cause More Multiyear La Niña Events: Study

Early Ancestral Bottleneck Could've Spelled the End for Modern Humans

Using a novel method called FitCoal, the researchers were able to accurately determine demographic inferences by using modern-day human genomic sequences from 3,154 individuals.

Monitoring of Radio Galaxy M87 Confirms Black Hole Spin

The nearby radio galaxy M87, located 55 million light-years from the Earth and harboring a black hole 6.5 billion times more massive than the Sun, exhibits an oscillating jet that swings up and down with an amplitude of about 10 degrees, confirming the black hole's spin.

Canadian Wildfires Produce Catastrophic Carbon Emissions This Year

Scientists from the Institute of Applied Ecology estimated that the carbon dioxide emissions from forest fires in Canada this year had reached 1 billion tons.

Chinese Paleontologists Find New Fossil Link in Bird Evolution

Researchers from the Institute of Vertebrate Paleontology and Paleoanthropology and the Fujian Institute of Geological Survey described and analyzed a new 150-million-year-old avialan theropod from Fujian Province.

Martian Dunes Eroded by a Shift in Prevailing Winds after the Planet's Last Ice Age

Researchers from the National Astronomical Observatories assessed the surface structure and chemical composition of Martian dunes to determine the age of sand structures and prevailing wind directions at different locations near the Zhurong rover landing site.

Earth's Oldest-known Rocks Provide Clues About Early Tectonics

New geochemical evidence obtained from Earth’s oldest-known rocks—found in remote lake regions of northern Canada—provides clues about Earth's early tectonics, according to a study led by Prof. LI Xianhua from the Institute of Geology and Geophysics.

Astronomers Discover Forming Quadruple-star System: More Intimate, More Complex

Prof. LIU Tie's team from the Shanghai Astronomical Observatory conducted a high-resolution investigation on 72 dense cores in the Orion GMCs with ALMA, and discovered a forming quadruple-star system within one core.

Scientists Use FAST to Discover a New Population of 'Dwarf' Pulses

Researchers led by Prof. HAN Jinlin from the National Astronomical Observatories have detected distinct "dwarf pulses" from a bright pulsar PSR B2111+46, and studied the radio emission in unprecedented details and probed the unknown physics in the magnetosphere.

Fossil Unveils Leaf Eating Among Earliest Birds

A new type of analysis of a spectacular 120-million-year-old fossil skeleton of the extinct early bird Jeholornis from northeastern China has revealed the oldest evidence for birds eating leaves, marking the earliest known evolution of arboreal plant-eating among birds.

Global Warming Will Cause More Multiyear La Niña Events: Study

Researchers from China, Australia and the U.S. have revealed that multiyear La Niña events are expected to increase under global warming.