"Technological Civilizations Should Go Extinct After 200 Years" --An Astrophysicist Answers the Fermi Paradox (Today's 'Galaxy' Stream)

 

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Our universe is incomprehensibly vast, with billions of other planets circling billions of other stars. The potential for intelligent life to exist somewhere out there should be enormous. According one astrophysicist at the University of Arkansas, we became "technological" after the industrial revolution and the invention of radio, or roughly 100 years ago. According to the principle of mediocrity, a bell curve of the ages of all extant technological civilizations in the universe would put humans in the middle 95 percent. In other words, technological civilizations that last millions of years, or longer, would be highly atypical.

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NASA --Binary Stars in Starburst Galaxies May Be Source of Gravitational Waves

 

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In 1887, American astronomer Lewis Swift discovered a glowing cloud, or nebula, that turned out to be a small galaxy about 2.2 billion light years from Earth. Today, it is known as the "starburst" galaxy IC 10, referring to the intense star formation activity occurring there.

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Is China's Fleet of Underwater Ocean Drones for Science, or Military Power?

 

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China has deployed underwater drones -torpedo-shaped vehicles — called Haiyi, or sea wings in Mandarin- in the strategic South China Sea waterway for scientific purposes where they will remain underwater for a month, according to reports. In March, one device hit a depth of 6,329 meters, breaking an earlier record held by a U.S. vessel, Xinhua said. But observers ask is the technology actually being used as a political and military tool to secure its territorial ambitions. Beijing claims a massive section of the South China Sea that extends roughly 1,000 miles from its southern shores.

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NASA's Apollo 15 Moon Rocks Reveal Death of Lunar Magnetic Field --"Once 1,000 Times Larger Than Those in Interplanetary Space Today"

 

 

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"Today the moon's field is essentially zero," says Benjamin Weiss, professor of planetary sciences at MIT. "And we now know it turned off somewhere between the formation of this rock and today."

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"After 20 Years --The Final Five!" Cassini Spacecraft to Begin Last Epic Flybys Through Saturn's Atmosphere (VIEW VIDEO)

 
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"Cassini's Titan flybys prepared us for these rapid passes through Saturn's upper atmosphere," said Earl Maize, Cassini project manager at NASA's Jet Propulsion Laboratory in Pasadena, California. "Thanks to our past experience, the team is confident that we understand how the spacecraft will behave at the atmospheric densities our models predict."

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Is Dark Matter a Cosmological Relic? --"Higgs Particle May Show Existence of a New Mechanism"

 

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Only a small part of the universe consists of visible matter. By far the largest part is invisible and consists of dark matter and dark energy. Very little is known about dark energy, but there are many theories and experiments on the existence of dark matter designed to find these as yet unknown particles. Scientists at Johannes Gutenberg University Mainz (JGU) in Germany have now come up with a new theory on how dark matter may have been formed shortly after the origin of the universe.

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Intense Glacial Melt Triggers Changes in Antarctica's Polar Deserts --"A Delicate Ecological Balance"

 

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An abnormal season of intense glacial melt in 2002 triggered multiple distinct changes in the physical and biological characteristics of Antarctica's McMurdo Dry Valleys over the ensuing decade, new research funded by the National Science Foundation (NSF) shows. The findings suggest that abrupt, short-lived climate events can cause long-term alterations in polar regions that unfold over the span of several years and subsequently change the overall trajectory of an ecosystem.

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The Titanosaur! Largest Dinosaur Ever Discovered --"As Big as the Space Shutttle"

 

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Move over, Tyrannosaurus rex! The largest dinosaur ever discovered, P. mayorum was discovered by a shepherd in 2012 on the La Flecha Farm in the Chubut Province in the Argentinian desert when he spotted the tip of a huge fossil bone sticking out of a rock. The femur, measuring 7.8 feet in length, was the biggest ever found. As excavation work begin, experts soon realized they had found a huge new species of dinosaur, the biggest of a group of large dinosaurs called titanosaurs. The biggest vertebrate to ever walk the Earth—measured 121 feet in length and 46 feet in height, and at 76 tons (69 metric tons), the plant-eating colossus was as heavy as a space shuttle.

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"12 Light Years Away" --Four Rocky, Earth-Like Planets Detected Orbiting Our Nearest Sun-like Star, Tau Ceti

 
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Sun-like stars are thought to be the best targets in the search for habitable Earth-like planets due to their similarity to the sun. Unlike more common smaller stars, such as the red dwarf stars Proxima Centauri and Trappist-1, they are not so faint that planets would be tidally locked, showing the same side to the star at all times. Tau Ceti is very similar to the sun in its size and brightness, and both stars host multi-planet systems.

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LIGO Gravitational Wave Discovery Reveals Our Milky Way Galaxy Harbors as Many as 100 Million Black Holes -- "Far More Than Anticipated”

 

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“Fundamentally, the detection of gravitational waves was a huge deal, as it was a confirmation of a key prediction of Einstein’s general theory of relativity,” said UCI chair and professor of physics & astronomy James Bullock. “But then we looked closer at the astrophysics of the actual result, a merger of two 30-solar-mass black holes. That was simply astounding and had us asking, ‘How common are black holes of this size, and how often do they merge?’”

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