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For something that’s supposed to help save the planet, solar geoengineering sure has a lot of enemies. Critics warn that artificially reflecting sunlight to cool the planet could unleash drastic, unintended consequences – but a Harvard-led team of scientists insists that such fears are overblown. In a new study, researchers say spraying chemicals into the
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SpaceX has a new all-star crew member, though it’s anything but human: It’s a $US20 plush-toy planet that astronauts call “Little Earth” or “Earthy”. Last Saturday, SpaceX launched its new Crew Dragon spaceship designed for NASA astronauts toward the International Space Station (ISS), where the vehicle docked on March 3. No humans flew on the historic commercial mission, called Demo-1 – only a crash-test
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In the course of looking for possible signs of Extra-Terrestrial Intelligence (ETI), scientists have had to do some really outside-of-the-box thinking. Since it is a foregone conclusion that many ETIs would be older and more technologically advanced than humanity, those engaged in the Search for Extra-Terrestrial Intelligence (SETI) have to consider what a more advanced
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In November, Chinese researchers announced that the Experimental Advanced Superconducting Tokamak (EAST) reactor — an “artificial sun” designed to mimic the nuclear fusion process the real Sun uses to generate energy — had hit a milestone by achieving an electron temperature of 100 million degrees Celsius. Now, officials are saying they believe they’ll wrap up
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A new study from the Georgia Institute of Technology suggests autonomous driving systems may have more difficulty detecting pedestrians with dark skin than those with light skin. The researchers responsible for the study had eight image-detection systems analyse images of pedestrians. The people in the photos were separated into two groups based on how their
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We’ve been looking for decades for dark matter, yet the mysterious stuff remains undetectable to our instruments. Now, astrophysicists have explored an intriguing possibility: what if it’s not dark matter that’s affecting galactic rotation after all. What if it’s the mass of light instead? In a 1980 paper, the American astronomer Vera Rubin pretty conclusively
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Some icebergs look white. Others look blue. But perhaps the most precious of all appear emerald green. Ever since the 1900s, sailors and explorers have occasionally seen these strange green icebergs, or jade bergs, floating around in the grey Antarctic landscape. Their curious colour has been puzzling scientists for decades; now, we might finally have