Science

[ad_1] Each fall, more than half of the coho salmon that return to Puget Sound’s urban streams die before they can spawn. In some streams, everyone dies. But the scientists didn’t know why. Now a team led by researchers from the University of Washington Tacoma, UW and Washington State University …

[ad_1] It took 17 seconds for the huge Arecibo Observatory radio telescope to crumble. It will take much longer for the dust to settle. Puerto Rico’s iconic structure collapsed on December 1 after cable failures in August and November made the telescope too delicate to be safely repaired. The US …

[ad_1] 1963: Arecibo Ionospheric Observatory commissioned for service on November 1 for $ 9.7 million. 1965: One of his first results was to establish Mercury’s rotation rate, which turned out to be 59 days instead of the 88 days previously estimated. 1968: Sporadic radio pulses from the direction of the …

[ad_1] For Pacific Northwest salmon, returning to spawn in streams and creeks near urban areas can be a death sentence, thanks to a ubiquitous additive in vehicle tires, a new study reveals. The results show that 6PPD-quinone – a highly toxic oxidation product of tire rubber particles – transforms toxic …

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[ad_1] NASA astronaut Kate Rubins collected radishes to send them back to Earth. NASA NASA astronaut Kate Rubins has joined a proud lineage of space gardeners. It harvested the first radish crop ever grown on the International Space Station on November 30 and NASA described it as a “historic crop”. …

[ad_1] A huge space rock, twice the size of Big Ben, will whiz past Earth tonight, say NASA brains. The asteroid, dubbed 2020 WD5, will zoom in close to us just before 20:30. Scientists say the colossus measures between 96 and 210 meters in diameter. Although more than four million …

[ad_1] Quantum Advantage Demonstrated Using Gaussian Boson Sampling – Physics World Skip to main content More Toggle Menu MENU Open the search dialog Close the search menu Learn more from Physics World Copyright © 2020 by IOP Publishing Ltd and individual contributors bright-rec pub iop iop-science physcis connect [ad_2] Source …

[ad_1] Everywhere we look in the natural world, there is evidence of natural selection: the resin armor of a lodgepole pine cone evolved to defend itself against seed-hungry birds and squirrels, or a giraffe’s long neck was evolutionarily favored to reach high vegetation that the competition cannot touch. Natural selection …

[ad_1] For some, the sound of a “perfect stream” might be the gentle lapping of a forest stream or perhaps the tinkling of water being poured from a pitcher. For physicists, a perfect flow is more specific, referring to a fluid that flows with the least amount of friction, or …