By Daniel CleryMar. 14, 2019 , 9:30 AM PENTICTON, CANADA—Reporting from the Dominion Radio Astrophysical Observatory here requires old-school techniques: pad and pen. Upon arrival, I must turn off my digital recorder and cellphone and stash them in a shielded room with a Faraday cage—a metal mesh that prevents stray electromagnetic signals from escaping. The point is to keep any interference away from the observatory's newest radio telescope, the Canadian Hydrogen Intensity Mapping Experiment (CHIME). On a clear, cold day in January, Nikola Milutinovic stands on the vertiginous gantry that runs along the focus of one of CHIME's four 100-meter-long, trough-shaped dishes. Milutinovic, a scientific engineer at the University of British Columbia (UBC) in Vancouver, scans their reflective surfaces for snow, which generally sifts through the metallic mesh but sometimes sticks and freezes. Snow-covered hills surround him, shielding CHIME from the cellphone towers, TV … [Read more...] about A homespun Canadian telescope could explain mysterious radio signals from the distant universe
Polar bears how many are left
Peggy’s data were a bit of a shock.From an anchored vantage point in an expanse of the southeastern Bering Sea west of Alaska, Peggy, or mooring M2, had monitored conditions in the water for 25 years. A line of sensors extended down more than 70 meters to where Peggy was tethered to the seafloor, collecting information on temperature, salinity and other properties of the water.Most years, the waxing and waning of floating sea ice follows a consistent seasonal pattern that is reflected in Peggy’s data. By November, sea ice migrates in through the Bering Strait or forms in some parts of the Bering Sea. As a by-product of the sea ice formation, a large mass of cold, salty water begins to pool near the seafloor. In the spring, phytoplankton bloom, and by early summer, the sea ice begins to melt away. The cold pool, however, lingers through the summer. With an average temperature just below zero degrees Celsius — a few degrees colder than the surrounding water — … [Read more...] about What happens when the Bering Sea’s ice disappears?
This story was originally published by The Guardian and is reproduced here as part of the Climate Desk collaboration. Greta Thunberg cut a frail and lonely figure when she started a school strike for the climate outside the Swedish parliament building last August. Her parents tried to dissuade her. Classmates declined to join. Passersby expressed pity and bemusement at the sight of the then unknown 15-year-old sitting on the cobblestones with a hand-painted banner. Eight months on, the picture could not be more different. The pigtailed teenager is feted across the world as a model of determination, inspiration, and positive action. National presidents and corporate executives line up to be criticized by her, face to face. Her Skolstrejk för Klimatet (school strike for climate) banner has been translated into dozens of languages. And, most striking of all, the loner is now anything but alone. On March 15, when she returns to the cobblestones (as she has done almost every Friday in … [Read more...] about A Teen Started a Global Climate Protest. What Are You Doing?
By Sara Miller and Jeanna Bryner, Live Science | December 30, 2018 08:53am ET Credit: Jonathan Nimerfroh/jdnphotography.com Slurpee waves The cold that gripped the U.S. East Coast this past winter created a gorgeous phenomenon along the coast of Nantucket, Massachusetts — slurpee waves. As if frozen mid-break, these waves were surfable, according to photographer and surfer Jonathan Nimerfroh, who captured the surreal photos. Credit: NASA/NOAA GOES Project/Twitter Bomb cyclone A rotating winter storm that churned its way across the U.S. East Coast in January made for some stunning satellite images, like this one captured by the National Oceanic and Atmospheric Administration's GOES-East satellite. The storm was also an opportunity to learn about a phenomenon described by some pretty cool words — bomb cyclone and .... wait for it, bombogenesis. A bomb cyclone occurs when the atmospheric pressure inside a weather system drops rapidly, causing that … [Read more...] about 100 Best Science Photos of 2018
On May 30, 2008, a research team armed with GPS units, notebooks, and binoculars set out into a dense patch of jungle in Indonesian Borneo. An oil palm company had commissioned them to survey the area for important environmental and cultural assets that might be impacted should the forest be converted into a plantation. They had no idea, however, that an “exceptional herpetofaunal discovery” awaited them that morning, they later wrote. As midday approached, the sweating group decided to take a break from their uphill trek to have lunch next to a shallow, rocky stream bed. Glancing at the creek between bites, one of the local team members spotted something of note: a brownish-yellow reptile, about a foot long, that he referred to simply as kadal—the generic Indonesian word for “lizard.” The partially submerged creature had the elongated, snakelike body of a Chinese dragon, the facial features of a cartoon dinosaur, and the pronounced scales of a … [Read more...] about How a Reclusive Lizard Became a Prize Find for Wildlife Smugglers