As if Tyrannosaurus rex wasn’t terrifying enough already. A skeleton in Canada belonged to a T. rex that was comfortably heavier than any other previously found, making it the largest land predator on record. The discovery means we may have underestimated just how large predatory dinosaurs could grow. Image: Amanda Kelley
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Last week, researchers took a small but significant step forward in the battle against HIV. A person named in public only as the ‘London patient’ has apparently been left free of the virus after a bone marrow transplant for a form of blood cancer. Image: greyloch
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Mental health care services are going through a quiet revolution, fueled in part by the widely acknowledged problem of access to therapists and other licensed professionals. No one disputes that new services like Sibly are exciting and innovative. The bigger question is whether they will actually have a positive impact, or whether offering mental health care without involving licensed therapists has the potential to cause real harm. Image: Lieutenant Pol
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Stone Age Europe was a lonely place to live. An assessment of ancient population sizes suggests a vast swathe of western and central Europe may have been home to no more than 1500 people at any one time. Image: PlanetObserver
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For a few species of microbe, DNA is more than a library of genetic information: it’s also lunch. Some bacteria that live in the mud below the seafloor appear to survive by eating DNA trapped in the dirt. Image: thdoubleu
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