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Science and Tech Actions Facebook Tweet Email The Science Of Spit Evolutionary geneticists and biologists have tracked a ghost species while studying human saliva and its evolution. Prev Next By: Megan Smith Posted Related StoryScientists Say Antarctic Animals May Not Be Safe From Human Pathogens Most Recent Trump pauses Russia sanctions as Zelenskyy urges allies to fight for them AP via Scripps News Group Pope Leo XIV cleared to leave hospital following lung cancer surgery AP via Scripps News Group Trump rallies with top Republicans in critical battleground state of Georgia AP via Scripps News Group Science and Tech Bullets & Death Threats Over AI Data Centers, and the Ukraine Crisis Scripps News Group El Niño is expected to shape this winter’s weather, and your budget, too Maura Barrett OpenAI faces lawsuits from 8 states over ChatGPT's impact on children Scripps News Group Watch Scripps News on your favorite app or smart TV. About Scripps News Download the Scripps News app