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Making Quantum Dots Glow Brighter

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Researchers have found a new way to control the properties of quantum dots, those tiny chunks of semiconductor material that glow different colors depending on their size. Quantum dots, which are so small they start to exhibit atom-like quantum properties, have a wide range of potential applications, from sensors, light-emitting diodes, and solar cells, to fluorescent tags for biomedical imaging and qubits in quantum computing.

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Elusive Quantum Transformations Found Near Absolute Zero

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To isolate quantum fluctuations that define the properties of a metallic material, scientists probed it at temperatures colder than interstellar space. The research provides new methods to identify and understand promising new materials, including superconductors.

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Early Earth Less Hellish Than Previously Thought

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Conditions on Earth during its first 500 million years may have been cool enough to form oceans of water instead of being too hot for life to form.

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How an Ancient Vertebrate Uses Familiar Tools to Build a Strange-Looking Head

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Investigator and Scientific Director Robb Krumlauf, Ph.D. and colleagues show that the sea lamprey Petromyzon marinus, a survivor of ancient jawless vertebrates, exhibits a pattern of gene expression that is reminiscent of its jawed cousins, who evolved much, much later.

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Scientists Report First Semiaquatic Dinosaur, Spinosaurus

Scientists today unveiled what appears to be the first truly semiaquatic dinosaur, Spinosaurus aegyptiacus.

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Study: Cat Bites Dog

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A new study led by the Wildlife Conservation Society reveals that in India’s human dominated agricultural landscapes, where leopards prowl at night, it’s not livestock that’s primarily on the menu – it is man’s best friend.

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The Ozone Hole Has Stabilized – Some Questions Remain

The production and consumption of chemical substances threatening the ozone layer has been regulated since 1987 in the Montreal Protocol. Eight international expert reports have since been published, which examine the current situation and the future of the threat to the ozone layer. Empa scientists made a decisive contribution to the latest report – presented on 10 September at the United Nations Headquarters in New York.

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Hubble Finds Companion Star Hidden for 21 Years in a Supernova's Glare

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Using NASA’s Hubble Space Telescope, astronomers have discovered a companion star to a rare class of supernova, known as a Type IIb. The discovery confirms a long-held theory that the supernova, dubbed SN 1993J, occurred inside what is called a binary system, where two interacting stars caused a cosmic explosion.

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