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Star Dust Helps Explain Mysterious Dimming Star
Astronomers are working to understand the mysterious dimming of Tabby's Star. The astronomers report that space dust orbiting the star -- not alien megastructures -- is the likely cause of the star's long-term dimming. www.sciencedaily.com/releas...
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Breast cancer linked to bacterial imbalances
Researchers have uncovered differences in the bacterial composition of breast tissue of healthy women vs. women with breast cancer. The research team has discovered for the first time that healthy breast tissue contains more of the bacterial species Methylobacterium, a finding which could offer a new perspective in the battle against breast cancer. www.sciencedaily.com/releas...
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Panda habitat shrinking, becoming more fragmented
Using remote sensing data, Chinese and US scientists have re-assessed the conservation status of the giant panda. Their analysis shows that while panda numbers are increasing, their habitat still covers less area and is more fragmented than it was in 1988, when the species was listed as endangered on the IUCN Red List. www.sciencedaily.com/releas...
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Mars study yields clues to possible cradle of life
The discovery of evidence for ancient sea-floor hydrothermal deposits on Mars identifies an area on the planet that may offer clues about the origin of life on Earth. The research offers evidence that these deposits were formed by heated water from a volcanically active part of the planet's crust entering the bottom of a large sea long ago. www.sciencedaily.com/releas...
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JILA's 3-D quantum gas atomic clock offers new dimensions in measurement
Physicists have created an entirely new design for an atomic clock, in which strontium atoms are packed into a tiny three-dimensional cube at 1,000 times the density of previous one-dimensional clocks. In doing so, they are the first to harness the ultra-controlled behavior of a so-called 'quantum gas' to make a practical measurement device. www.sciencedaily.com/releas...
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Siberian volcanic eruptions caused extinction 250 million years ago, new evidence shows
The Great Permian Extinction, which occurred approximately 250 million years ago, was caused by massive volcanic eruptions that led to significant environmental changes, new evidence shows. www.sciencedaily.com/releas...
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Meteorite tells us that Mars had a dense atmosphere 4 billion years ago
Exploration missions have suggested that Mars once had a warm climate, which sustained oceans on its surface. To keep Mars warm requires a dense atmosphere with a sufficient greenhouse effect, while the present-day Mars has a thin atmosphere whose surface pressure is only 0.006 bar, resulting in the cold climate it has today. It has been a big mystery as to when and how Mars lost its dense atmosphere. www.sciencedaily.com/releas...
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Violent helium reaction on white dwarf surface triggers supernova explosion
Astronomers have found solid evidence about what triggered a star to explode, which will contribute to a further understanding of supernova history and behavior. www.sciencedaily.com/releas...
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What Earth's climate system and topological insulators have in common
New research shows that equatorial waves -- pulses of warm ocean water that play a role in regulating Earth's climate -- are driven by the same dynamics as the exotic materials known as topological insulators. www.sciencedaily.com/releas...
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Farthest active inbound comet yet seen
NASA's Hubble Space Telescope has photographed the farthest active inbound comet ever seen, at a whopping distance of 1.5 billion miles from the Sun (beyond Saturn's orbit). Slightly warmed by the remote Sun, it has already begun to develop an 80,000-mile-wide fuzzy cloud of dust, called a coma, enveloping a tiny, solid nucleus of frozen gas and dust. These observations represent the earliest signs of activity ever seen from a comet entering the solar system's planetary zone for the first time. www.sciencedaily.com/releas...