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[Special Issue News] General Relativity: The comic book

SCIENCE MAGAZINE - 1 hour 25 min ago
In 1915, Albert Einstein explained that the force of gravity arises when mass and energy warp space and time, or spacetime. Freefalling objects then follow the straightest possible paths, or geodesics, in that warped spacetime, which to us appear as the arcing trajectory of a thrown ball or the elliptical orbit of a planet. Einstein labored for years to translate this notion into a mathematically consistent theory. But anybody can understand how Einstein arrived at the basic idea. All we need to do is to follow his mental footsteps—which led him up an imaginary building and off of its roof. Bring your cape and take the plunge! Author: Adrian Cho
Categories: Wild Music News

[Special Issue News] Drop test

SCIENCE MAGAZINE - 1 hour 25 min ago
About 425 years ago, Galileo Galilei supposedly dropped pairs of balls of different sizes and materials from the Leaning Tower of Pisa to show that all objects accelerate at the same rate under gravity's pull. Now, physicists are performing various versions of this classic experiment (which Galileo probably never performed) to test a basic premise of Einstein's theory of gravity, or general relativity, called the equivalence principle. In April 2016, a French satellite will blast off to see whether two free-floating cylinders of different materials orbit Earth at exactly the same altitude. Another team of physicists aims to reproduce Galileo's freefall experiment with two different types of atoms. Such work compares an object's inertial mass, which determines how much it resists moving when subjected to a force, and its gravitational mass, which determines how strongly gravity pulls on the thing. That equivalence explains Galileo's experiment. According to general relativity, it must hold exactly. If it doesn't, general relativity cannot be the ultimate theory of gravity. Author: Adrian Cho
Categories: Wild Music News

Knife attack wounds nine at Chinese train station

Reuters - March 5, 2015 - 11:52pm
BEIJING (Reuters) - Knife-wielding attackers slashed and stabbed people at a railway station in the southern Chinese city of Guangzhou, wounding at least nine before police shot dead one of the suspected assailants and arrested another.






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Galactic LENS-FLARE gives boffins a giant TIME MACHINE

Register - March 5, 2015 - 11:02pm
Hubble supernova surprise: Light gets bent, big-time

Video “That's odd” has to be one of the scientist's favourite phrases: a set of images of a distant supernova has shown off a phenomena first predicted in 1964.…

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Teenage TV audiences and energy drink advertisements

Eureka Alert - March 5, 2015 - 11:00pm
(Elsevier Health Sciences) Researchers at Dartmouth College examined a database of television advertisements broadcast between March 2012 and February 2013 on 139 network and cable channels and found that more than 608 hours of advertisements for energy drinks were aired. Nearly half of those advertisements, 46.5 percent, appeared on networks with content themes likely to appeal to adolescents.
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Images of star exploding four times captured by astronomers

The Guardian - March 5, 2015 - 10:57pm

Australian researchers were part of team able to capture images because of gravitational lensing, which magnified a supernova 9.3bn light years away

Continue reading...
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Pop-up playgrounds fold themselves

BBC - March 5, 2015 - 10:04pm
US researchers build tiny electronic scaffolds using a new technique aimed at merging biology with electronics.
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South Korea police probing U.S. ambassador attacker's visits to North Korea

Reuters - March 5, 2015 - 9:56pm
SEOUL (Reuters) - South Korean police said on Friday they are investigating possible links between a knife attack on the U.S. ambassador to Seoul and the assailant's frequent visits to North Korea, as they also sought to charge him with attempted murder.






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Winter storm pummels eastern United States, grounds flights

Reuters - March 5, 2015 - 9:05pm
WASHINGTON (Reuters) - A late winter storm pummeled the eastern United States on Thursday ahead of a cold front, canceling almost 5,000 flights as Kentucky dug out from up to 23 inches (58 cm) of snow that had stranded hundreds of drivers.
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Australia's new broadband satellites won't be all the help Willowra needs

Register - March 5, 2015 - 9:02pm
Megabit birds for the bush aren't the only answer to our broadband quest

One of the things we've been asked about our project to figure out how to improve network performance at the Wirliyajarrayi Learning Centre in the remote Australian town of Willowra is why we are bothering.…

Categories: Wild Music News

Review of Hillary Clinton emails to take months: official

Reuters - March 5, 2015 - 8:38pm
WASHINGTON (Reuters) - A growing controversy over Democrat Hillary Clinton's use of personal email for work while she was U.S. secretary of state could drag on for months, threatening to cloud the expected launch of her 2016 presidential campaign.






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Mars once had an entire ocean -- and then lost it, scientists say

LA Times - March 5, 2015 - 8:22pm
Dry, dusty Mars once had an ocean that held as much water as the Arctic Ocean and covered a larger share of the Red Planet’s surface than the Atlantic Ocean does on Earth, according to a surprising new study.
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Mars has lost an Arctic Ocean's worth of water

CBS - March 5, 2015 - 8:04pm
Research suggests that billions of years ago, half of Mars was covered in a mile-deep sea that disappeared into space
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Excess sitting linked to coronary artery calcification, an early indicator of heart problems

Science Daily - March 5, 2015 - 7:59pm
Sitting for many hours per day is associated with increased coronary artery calcification, a marker of subclinical heart disease that can increase the risk of a heart attack, according to research. Coronary artery disease is the most common type of heart disease and the leading cause of death in the United States.
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Hot flashes at younger age may signal greater cardiovascular risk

Science Daily - March 5, 2015 - 7:59pm
Women who experience hot flashes earlier in life appear to have poorer endothelial function -- the earliest sign of cardiovascular disease -- than women who have hot flashes later in life or not at all, according to two new studies.
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Women don't get to hospital fast enough during heart attack

Science Daily - March 5, 2015 - 7:59pm
Women suffering a heart attack wait much longer than men to call emergency medical services and face significantly longer delays getting to a hospital equipped to care for them, putting women at greater risk for adverse outcomes.
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Robert G. Dean, Restorer of Beaches, Dies at 84

NY Times - March 5, 2015 - 7:36pm
The techniques he advanced are routine today almost everywhere on developed coastlines; without them, many beach towns would be without beaches.






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Watch a praying mantis leap in super slo-mo

CBS - March 5, 2015 - 7:35pm
Praying mantises have an uncanny ability to jump at lightning speed and always land on their target. A new study sheds light on how they are able to achieve their acrobatic feats.
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Potential weight-loss agent from a tree is almost too good to be true

LA Times - March 5, 2015 - 7:18pm
It has qualities so remarkable, it could come from the land of Oz (and could become the television doctor's next big thing, too): a compound derived from a tree growing in South and Central America prompted obese mice to lose 20% to 30% of their weight. It also allowed normal, healthy mice to...
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Oxytocin makes men eat less, choose healthier foods

LA Times - March 5, 2015 - 7:07pm
First, we learn that the "love hormone" oxytocin makes men more trusting, nurturing and sociable. Then, we learn that a shot of the stuff makes partnered men less likely to stray or even flirt with other women. Now, we learn that a puff of oxytocin up the nose makes men eat less, and choose...
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