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In testing the genetic material of current populations in Africa and comparing against existing fossil evidence of early Homo sapiens populations there, researchers have uncovered a new model of human evolution -- overturning previous…

The accepted view of Mars is red rocks and craters as far as the eye can see. That's much what scientists expected when they landed the rover Perseverance in the Jezero Crater, a spot chosen partly for the crater's history as a lake and as…

A new study has found that a highly antibiotic-resistant strain of the superbug MRSA -- methicillin resistant Staphylococcus aureus -- has emerged in livestock in the last 50 years, probably due to widespread antibiotic use in pig farming.…

Scientists have found evidence that a type of the antibiotic resistant superbug MRSA arose in nature long before the use of antibiotics in humans and livestock, which has traditionally been blamed for its emergence. Hedgehogs carry a fungus…

WASHINGTON: The effectiveness of Covid-19 vaccines among front-line workers declined to 66% after the delta variant became dominant, compared with 91% before it arose, according to a report from the US Centers for Disease Control and…