Scientists have warned that ancient 'zombie viruses' trapped in permafrost in Siberia may soon be released and cause a new deadly pandemic as shipping in the region increases. Scientists have known for years that 'Methuselah microbes', cells that have stayed dormant in permafrost for tens of thousands of years, carry the risk of propagating and spreading like wildfire if taken out of their icy confines. But they have begun to warn that with 2023 being the warmest year on record - by a long way - since global records began in 1850, the risk of a deadly pandemic caused by...