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New Charging Technique Puts Crumbling Batteries Back Together

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For electric cars to run as long as possible between charges, their batteries need to pack a punch. One option would be lithium-metal batteries, which have a key component made of this energy-dense element. This gives them greater storage capacity than widely used lithium-ion batteries, in which the same component is made from graphite. Although … Read more

Comet Leonard puts on a final, spectacular display with ion tail in solar wind

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Comet Leonard is falling out of view, but not without putting on one last show. Discovered just a year ago, the comet, formally known as Comet C/2021 A1, made its closest approach to Earth on Dec. 12, marking the climax of a month full of prime observing opportunities. As the comet has continued on its … Read more

Polar bears: Extreme lack of sea ice in Hudson Bay puts predators under pressure

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Sea ice in Canada’s Hudson Bay has been unusually late to form, raising fears over the impact on polar bears that hunt for seals on the ice Environment 6 December 2021 By Adam Vaughan A lone polar bear along Hudson Bay Cindy Hopkins / Alamy An extreme lack of sea ice in Canada this winter … Read more

Deep sea mining: Race to exploit the sea floor puts ecosystems at risk

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Governments are meeting in Jamaica this week to decide how rules for commercial mining of metals on the ocean floor will be thrashed out, but there are big sticking points Environment | Analysis 8 December 2021 By Adam Vaughan A field of manganese nodules in deep-sea waters near Hawaii NOAA Office of Ocean Exploration and … Read more