European Researchers warned that climate change could reanimate frozen “zombie viruses” and expose humans to lethal diseases. In November 2022, researchers from France, Germany and Russia announced that they had reanimated one such virus. The virus they brought back to life had been frozen for more than 50,000 years. In their research, they studied 13 new pathogens and found that they were still infectious despite being buried in ice for thousands of years.