PBS NewsHour

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Engineers are experimenting with new ways of harnessing the power of sun. If they can generate enough heat from sunlight, they can drive chemical reactions and create renewable fuels. Photo by Science Nation/National Science Foundation Many cities...
Photo of Great Spring and Paradise Lake at Yellowstone National Park by Flickr user jamesbmore. What happens when a drone crashes into one of the world’s largest hot springs? The aircraft might potentially damage the spring, but trying to remove it...
Photo by David Paul Morris/Getty Images In an effort to make the Internet a safer place, Google will prioritize secure websites in search results, giving a boost to those URLs with an “https” — “s” as in “secure...
Thousands of Yazidi and Christian people flee Hamdaniyah town of Mosul to Erbil after the latest wave of Islamic State Group advances that began on Sunday has seen a number of towns near Iraq’s second largest city Mosul fall to the militants...
In space, no one can hear you snore. Astronaut Mike Hopkins takes a spacewalk outside the ISS in December, 2013. Photo by NASA According to the longest sleep study ever conducted in space, astronauts’ use of sleeping pills, such as Ambien, is...
A 2.6 million lightyear bridge of hydrogen gas — the largest known — stretches from a large galaxy located at the bottom left to the galaxy at the top. Image by Rhys Taylor/Arecibo Galaxy Environment Survey/The Sloan Digital Sky Survey...