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Electroreduction of carbon monoxide for the highly selective production of ethylene

Ethylene, or ethene, is a primary feedstock for the chemical industry, including as a starting material for the production of a wide variety of plastics. In the journal Angewandte Chemie, scientists have now introduced a new electrochemical technique for selective and energy-efficient production of ethylene from carbon monoxide, which can be obtained from renewable resources and waste.

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ISS sensors show terrestrial gamma-ray flash and ionospheric UV emissions spurred by lightning

A team of researchers from Denmark, Norway, Spain and Italy has found that both terrestrial gamma-ray flashes and ionospheric ultraviolet emissions are spurred by lightning. In their paper published in the journal Science, the group describes their study of data from the Atmosphere-Space Interactions Monitor (ASIM) aboard the International Space Station (ISS), and what they found.

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Sonar study shows crater made by underwater Bikini atoll A-bomb test

A team of researchers from the University of Delaware has mapped the seafloor where an atomic blast created a crater back in 1946 during a test. The team has given a presentation outlining their findings at this year's fall meeting of the American Geophysical Union. Using high-resolution sonar, the team created depth maps that showed not only the crater created by the blast but the test ships that were used to measure its power.

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Ancient lice-like insects found to feed on dinosaur feathers

A team of researchers affiliated with several institutions in China, the U.S. and Russia has found evidence of ancient lice-like insects that fed on dinosaur feathers. In their paper published in the journal Nature Communications, the group describes their study of two pieces of amber found in Myanmar and what they learned from them.

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Engineers pull off daring rescue of OSIRIS-REx asteroid mission

On Friday, Oct. 11, the OSIRIS-REx team should have been preparing to point their spacecraft cameras precisely over the asteroid Bennu to capture high-resolution images of a region known as Osprey. It is one of four sites scientists are considering from which the spacecraft can safely collect a sample in late 2020.

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A new way to measure cosmic black holes

Supermassive black holes are the largest black holes, with masses that can exceed a billion Suns. Just this spring, the first-ever image of the supermassive black hole at the center of the Messier 87 galaxy was taken, and researchers recently spotted the largest supermassive black hole ever seen. Despite these groundbreaking efforts, figuring out how these black holes drive a galaxy's shape and structure continues to be a challenge because most of them are too far away for current telescopes to resolve accurately.

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Relativistic jet of the blazar S5 0836+710 investigated in detail

Using very long baseline interferometry (VLBI), astronomers have performed comprehensive multiwavelength observations of the radio emission in the blazar S5 0836+710. The new research, presented in a paper published December 2 on arXiv.org, reveals important insights about the structure the blazar's relativistic jet.

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Tweaking the approach to save the desert tortoise

"Increase the size, increase the survival" is the premise behind head-starting—raising an at-risk species in captivity until it is large enough to be less vulnerable to predators after release into the wild. But research conducted by University of Georgia scientists in California's Mojave Desert reveals larger size alone is not enough to save the desert tortoise from predator attacks.

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Second stellar population found in Milky Way's thick disk

A new study on the kinematics and chemical composition of a sample of stars in the vicinity of the sun, led by Dr. Daniela Carollo, researcher of the Italian National Institute for Astrophysics, has revealed that the stars that make up the thick disk of the Milky Way belong to two distinct stellar populations with different characteristics and not to a single one, as has been thought for more than two decades.

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