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Thinking of going solar? Prices are approaching the cost of grid electricity, but only in some places – so far. joncallas/flickr

When will rooftop solar be cheaper than the grid? Here’s a map

When will residential solar be cheaper than the cost of power from the grid? This point of ‘grid parity’ is a moving target but moving closer in a number of places.
Anonymous takes on Trump. Guy Fawkes mask: laurelrusswurm/flickr; Trump: gageskidmore/flickr

How Anonymous hacked Donald Trump

Anonymous is not seeking to tear down Trump’s personal privacy, but something much more sacred to him: his brand.
Indiana University football coach Kevin Wilson explains VR-enabled training to his players. Indiana University Athletics

Athletes look for an edge in a new place: virtual reality

Virtual reality technology is a radical departure from traditional video presentation, with myriad applications in both consumer media and in athletic practice.
A student at Marjory Stoneman Douglas High School in Parkland, Fla., speaks to the media after a former student opened fire at the school on Feb. 14, killing more than a dozen people. AP/Wilfredo Lee

Here’s how witnessing violence harms children’s mental health

Children are increasingly being exposed to more violence. The impact? They could get desensitized to violence and come to believe that it is an acceptable way to solve problems.
Coral affected by black band disease, Bahamas. James St. John/Flickr

Is global warming causing marine diseases to spread?

Infectious diseases are a normal part of ocean ecosystems, just as they are on land. But climate change is altering the oceans in ways that could make marine diseases spread farther and faster.