91. An Ocean Battery, Regrowing Knee Cartilage, BMW’s Magnet Free Electric Motor

NEWS: <p><a href='https://techxplore.com/news/2022-01-ocean-battery-renewable-energy-dilemma.html'>'Ocean battery' targets renewable energy dilemma</a> | TechXplore (00:57)</p> <ul><li style="font-weight:400;">A wind turbine sitting idle on a calm day or spinning swiftly when power demand is already met poses a problem for renewables, and is one researchers think can be tackled under the sea.</li> <li style="font-weight:400;">The company, Dutch startup Ocean Grazer, has come up with the concept of a “ocean battery” <ul><li style="font-weight:400;">relies on massive flexible bladders on the seabed, which are filled up with seawater by the wind farm.</li> </ul> </li> <li style="font-weight:400;">When the power is needed, the pressure of the ocean squeezes the water through the system on the seafloor that includes turbines—and the result is electricity.</li> <li style="font-weight:400;">Systems that rely on pressure are already used in hydroelectric dams that pump water into the reservoir behind the dam when electricity demand falls, effectively storing it to come back through the facility's turbines.</li> <li style="font-weight:400;">Bliek, the Ocean Grazer CEO, said undersea systems take advantage of the pressure below the ocean that is free, while creating a system that he said is about 80 percent efficient in storing energy.</li> <li style="font-weight:400;">Bliek said his company aims to have an offshore system in place by 2025, though one will be deployed onshore in the northern Netherlands by 2023.</li> <li style="font-weight:400;">Though various aspects of energy storage via pressure are not new, the pairing of it with green energy sources carries significant potential.</li> </ul> <p> </p> <p><a href='https://scitechdaily.com/compelling-evidence-that-multiple-sclerosis-is-caused-by-epstein-barr-virus/'>Compelling Evidence That Multiple Sclerosis Is Caused by Epstein-Barr Virus</a> | SciTechDaily (06:37)</p> <ul><li style="font-weight:400;">Multiple sclerosis (MS), a progressive disease that affect