Tuesday, December 3, 2019
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Illustration of the giant asteroid collision in outer space that produced the dust that led to an ice age on Earth. Credit: (c) Don Davis, Southwest Research Institute
Space

Dust from a giant asteroid crash caused an ancient ice age

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The Wedderburn meteorite. (Museums Victoria/CC BY 4.0)
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Scientists Confirm The Discovery of a Mineral Never Before Seen in...

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Picture taken at one of the sites inspected in the Coastal Range of the Atacama Desert. On this picture Professor Azua-Bustos and González-Silva are donning sterile suites and using sterile collecting materials in order to avoid the contamination of the sites studied. Credit: Margarita Azua
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Atacama Desert microbes may hold clues to life on Mars

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The 21 shocked and unshocked zircon crystals dated in this study were separated from this ~30 cubic centimeters of unconsolidated late Eocene sediment obtained from Ocean Drilling Project site 1073, hole A. Credit: Biren/ASU
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Researchers study largest impact crater in the US, buried for 35...

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An example of a Pallasite meteorite (from the Esquel fall) on display in the Vale Inco Limited Gallery of Minerals at the Royal Ontario Museum.
Space

Meteorite strikes made life on Earth possible

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Depictions of large asteroids striking Earth, which, during parts of its early history, would have had a much thicker atmosphere than it does today. Credits: NASA with modifications by Stephen Mojzsis
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A new timeline of Earth’s cataclysmic past

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Researchers searching for fossils kept finding tiny glassy spheres inside ancient clams. After more than a decade, testing suggests they are evidence of one or more undocumented meteorite impacts in Florida’s distant past. Credit: Florida Museum photo by Kristen Grace
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Cosmic pearls: Fossil clams in Florida contain evidence of ancient meteorite

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Polar ice caps on Mars are a combination of water ice and frozen CO2. Like its gaseous form, frozen CO2 allows sunlight to penetrate while trapping heat. In the summer, this solid-state greenhouse effect creates pockets of warming under the ice, seen here as black dots in the ice.
Space

A material way to make Mars habitable

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A view from the “Kimberley” formation on Mars taken by NASA’s Curiosity rover.
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Ice-squeezed aquifers might create marsquakes

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laminar beds of sandstone
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Site of biggest ever meteorite collision in the UK discovered

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The comet 46P/Wirtanen on January 3, 2019.
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A family of comets reopens the debate about the origin of...

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New research focuses on filamentous microbes that make their living in hot springs and catalyze the formation of travertine rock.
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‘Fettuccine’ may be most obvious sign of life on Mars, researchers...

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The L6 ordinary chondrite El Médano 128, a 556 g meteorite recovered in the Atacama Desert. Photo courtesy CCJ-CNRS, P. Groscaux.
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Oldest meteorite collection on Earth found in one of the driest...

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The retreat of Mars' polar cap of frozen carbon dioxide during the spring and summer generates winds that drive the largest movements of sand dunes observed on the red planet.
Space

On Mars, sands shift to a different drum

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Snapshots of numerical modeling of the moon’s formation by a giant impact. The central part of the image is a proto-Earth; red points indicate materials from the ocean of magma in a proto-Earth; blue points indicate the impactor materials.
Space

Magma is the key to the moon’s makeup

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InSight's seismometer was taken on the 110th Martian day, or sol, of the mission.
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NASA’s InSight detects first likely ‘quake’ on Mars

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Mercury's interior based
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Mercury has a solid inner core

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Black Hole
Space

First Direct Images of a Black Hole

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Mars
Space

Scientists find likely source of methane on Mars

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A model for the compositional evolution of the early Earth's crust due to fractional crystallization of impact melt sheets followed by detachment and sinking of their dense primitive portions towards the crust-mantle boundary. Credit: Rais Latypov
Space

Ancient asteroid impacts played a role in creation of Earth’s future...

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