How Did The Moon Form? Study Says Many Small Impacts, Not One Giant Collision, Created Earth's Natural Satellite
According to the widely accepted “giant impact hypothesis,” proposed in the 1970s, the moon formed about 4.5 billion years ago when a Mars-sized planet slammed into early Earth. This theory suggests that most of what became the moon came from this “giant impactor.”If this explanation is true, a significant portion of the material that makes up the moon should have come from this mystery planet. However, analysis of lunar soil and rocks collected during the Apollo missions has shown that this is ..>> view originalPolar bear plan doesn't seek direct action on climate change (Update)
In this Sept. 5, 2012, file photo, Ahpun, a female polar bear, strolls around her cage at the Alaska Zoo in Anchorage, Alaska. The U.S. Fish and Wildlife Service released its plan Monday, Jan. 9, 2017, for the recovery of threatened polar …more. Five ...>> view originalScientists Predict Star Collision Visible To The Naked Eye In 2022
Scientists predict a star collision in the constellation Cygnus. NASA/IPAC/MSX hide caption toggle caption NASA/IPAC/MSX Scientists predict a star collision in the constellation Cygnus. NASA/IPAC/MSX Scientists predict that a pair of stars in the constellation Cygnus will ..>> view originalMethane may not last long in the atmosphere — but it drives sea level rise for centuries
Buildings are seen near the ocean as reports indicate that Miami-Dade County in the future could be one of the most susceptible places when it comes to rising water levels due to global warming on March 14, 2012 in North Miami, Fla. (Photo by Joe Raedle/Getty Images) It seems like just about every week, there’s more news on the rapid melting of glaciers in Greenland, Antarctica and elsewhere — and scientists’ growing concern about their potentially dramatic contributions to global sea level ..>> view originalWarmer Waters Linked to Higher Levels of Shellfish Toxin
The shell of a razor clam. Credit: ThelmaElaine/Shutterstock.com As the Earth warms up, you may want to lay off the shellfish: Warmer ocean waters are linked to increased — and possibly dangerous — levels of domoic acid, a toxin in shellfish and other marine animals that can make people sick, a new study finds. Researchers looked at more than two decades' worth of data, from 1991 to 2015, and compared ocean water conditions off the Oregon coast (using measures of climate variability ..>> view originalMIT creates 3D printed graphene that's lighter than air, 10X stronger than steel
MIT researchers have been able to use graphene to print 3D objects with a geometry that has 10 times the strength of steel but only a fraction of the wieght.The discovery using the strongest material there is has the potential to enable lightweight products for airplanes, cars, buildings and even filtration devices because of the printed objects' porous designs.In its typical two-dimensional, flat state graphene is only one atom thick, so like a sheet of paper it is flimsy and easily torn. ..>> view originalNewfound Asteroid Gives Earth a Close Shave
A smallish asteroid zoomed past Earth this morning (Jan. 9), just two days after scientists first spotted the space rock. The asteroid, known as 2017 AG13, flew by our planet at just half the distance from Earth to the moon today at 7:47 a.m. EST (1247 GMT). (On average, the moon lies about 239,000 miles, or 385,000 kilometers, from Earth.) You can learn more about today's flyby in this video of asteroid 2017 AG13 from Slooh.com, which includes details on the space rock from Slooh Commu..>> view originalFor the U.S., 2016 Was the Second Warmest Year on Record
Story HighlightsThe U.S. recorded its second warmest year on record in 2016.Two Midwestern states had their second wettest year, as well.Fifteen billion-dollar weather disasters occurred during the year.Near-record warm temperatures blanketed the United States from coast to coast in 2016, propelling the Lower 48 to its second warmest year on record. It was also a costly year with 15 weather-related events with a preliminary price tag of a billion dollars or more.The annual report from NOAA's Nat..>> view originalHow New Hubble Telescope Views Could Aid Interstellar Travel
Astronomers using the Hubble Space Telescope have gotten their best looks yet at the mysterious interstellar clouds surrounding the solar system, a new study finds. These observations could shed light on the challenges that future interstellar missions dispatched to the nearest stars might face, the researchers said. In 2012, NASA's Voyager 1 probe crossed the so-called heliopause — the giant bubble of electrically charged particles and magnetic fields surrounding the sun — and, in the..>> view original
Sunday, February 19, 2017
How Did The Moon Form? Study Says Many Small Impacts, Not One Giant Collision, Created Earth's Natural Satellite and other top stories.
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