ScienceDaily: New research has found methylmercury -- a potent neurotoxin -- in sea ice in the Southern Ocean. Published today in the journal Nature Microbiology, the results are the first to show that sea-ice bacteria can change mercury into methylmercury, a more toxic form that can contaminate the marine environment, including fish and birds. If ingested, methylmercury can travel to the brain, causing developmental and physical problems in foetuses, infants and children. The findings were made by an international...