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One of the first images taken by humans of the whole Earth. Photographed by the crew of Apollo 8 (probably by Bill Anders) the photo shows the Earth at a distance of about 30,000 km. South is at the top, with South America visible at the covering the top half center, with Africa entering into shadow. North America is in the bottom right. Date 1968 U.S. govt. [Public domain], via Wikimedia Commons

In 1968, Apollo 8 realised the 2,000-year-old dream of a Roman philosopher

In 1968, Apollo 8 realised the 2,000-year-old dream of a Roman philosopher NASA  Tom McLeish, University of York Half a century of Christmases ago, the NASA space mission Apollo 8 became the first manned craft to leave low Earth orbit, atop the unprecedentedly powerful Saturn V rocket, and head out…

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Why we will probably never have a perfect clock

Why we will probably never have a perfect clock pexels photo. Daniel Brown, Nottingham Trent University The time has come again when many of us switch our clocks from summer or daylight-saving time back to winter time. And the usual confusion sets in, is it an hour forwards or back?…

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Individual action won’t achieve 1.5℃ warming – social change is needed, as history shows

Individual action won’t achieve 1.5℃ warming – social change is needed, as history shows Kubko/Shutterstock.com Matthew Adams, University of Brighton Following the 2015 Paris Agreement to hold the global increase in climate to below 2℃ above pre-industrial levels, the UN’s Intergovernmental Panel on Climate Change (IPCC) was asked to produce…

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Blood moon: lunar eclipse myths from around the world

Blood moon: lunar eclipse myths from around the world Shutterstock Daniel Brown, Nottingham Trent University Millions have people have the opportunity to see a lunar eclipse – an event popularly known in the media as a “blood moon” – on Friday July 27. Visible for most of the world –…

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Once lauded for their vision and promise, Silicon Valley giants have made life so hard for locals that residents regularly protest the companies, including their amenities like charter buses to save workers from the region’s terrible traffic. AP Photo/Richard Jacobsen

Silicon Valley, from ‘heart’s delight’ to toxic wasteland

Silicon Valley, from ‘heart’s delight’ to toxic wasteland Once lauded for their vision and promise, Silicon Valley giants have made life so hard for locals that residents regularly protest the companies, including their amenities like charter buses to save workers from the region’s terrible traffic. AP Photo/Richard Jacobsen Andrew L.…

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For the first time, human beings harnessed the power of atomic fission. Keith Ruffles, CC BY

Atomic age began 75 years ago with the first controlled nuclear chain reaction

Atomic age began 75 years ago with the first controlled nuclear chain reaction For the first time, human beings harnessed the power of atomic fission. Keith Ruffles, CC BY Artemis Spyrou, Michigan State University and Wolfgang Mittig, Michigan State University Over Christmas vacation in 1938, physicists Lise Meitner and Otto…

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