Understanding how much protection a vaccine offers is not as simple as it sounds. The pandemic has brought many tricky terms and ideas from epidemiology…
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Individual trees in urban areas provide cooling during evening, research shows. A single tree along a city street or in a backyard can provide measurable…
H. Mephisto (the Devil Worm). (microscopic image, magnified 200x). Credit: Prof. John Bracht, American University When scientists discovered a worm deep in an aquifer nearly…