It sounds like it should be easy enough to know if ice is growing or retreating, but it really isn't.  Antarctic sea ice has been expanding, we are told, while Arctic sea ice is retreating, both at dramatic rates.

How accurate is satellite data? Processing errors can be a problem, but they are more heavily scrutinized whenever a study finds that sea ice anywhere is increasing. A paper in The Cryosphere tackles the satellite data problem, for the increase measured in Southern Hemisphere sea ice.

A vacuum - empty space - is not as empty as one might think. In fact, empty space is a bubbling soup of various virtual particles popping in and out of existence – a phenomenon called "vacuum fluctuations". Usually, such extremely short-lived particles remain completely unnoticed, but in certain cases vacuum forces can have a measurable effect.

A team of researchers have proposed a method of amplifying these forces by several orders of magnitude using a transmission line, channeling virtual photons.

"Borrowing" Energy, but just for a Little While

In the 1990s, it was claimed that minorities were less likely to get home mortgages 30 years after anti-discrimination laws were added to specify housing, so policies were instituted requiring justification when people were denied a home loan. As a result of widespread loan liberalization, everyone was able to get loans and there was a resulting mortgage loan crisis after the core of the system was revealed as flawed.

At various times, Alan Turing was hailed as a brilliant cryptologist, leading a team of code breakers at Bletchley Park which cracked the German Enigma machine cypher during World War II, and then later as a gay martyr. Now, due to popular media accounts of computers seeming 'human' over and over, he is known for The Turing Test and is getting a biopic, "The Imitation Game", starring Benedict Cumberbatch in the lead role.

In a 1950, Turing propose The Turing Test, where he outlined a standard for a computer being considered human and proposed that the solution to artificial intelligence would be a program with the mind of a child and teach it to think.  So the goal of the test is not to determine if a machine is correct, but whether or not it is considered real.

Kepler-421b
has been revealed as a transiting exoplanet with the longest known year - 704 days. For comparison, Mars orbits our Sun once every 780 days.

 The farther a planet is from its star, the less likely it is to transit the star from Earth's point of view. It has to line up just right, and most of the 1,800-plus exoplanets discovered so far are much closer to their stars and have much shorter orbital periods. The host star, Kepler-421, is located about 1,000 light-years from Earth in the direction of the constellation Lyra. 

Easy metrics like 'it takes a gallon of gas to make a pound of beef' or 'it takes 140 liters of water to make a cup of coffee' get mainstream media because they are outrageous. They are outrageous because they are completely wrong.

What is the 'real' cost of eating beef? Are the other animal or animal-derived foods better or worse?