In a well-rounded fashion diet, T-shirts are a lot like protein: You need them to grow big and stylish. The best heavyweight T-shirts will help you bulk up your outfits—or at least keep you warm when ...

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T cells are white blood cells that are important for adaptive immunity. They have unique cell surface receptors that are generated by randomly assorting genes. These receptors allow T cells to sense ...

Cannabis drug tests measure tetrahydrocannabinol (THC) and its metabolites, which can stay in your body long after the “high” fades. Detection ranges from hours in blood or saliva to weeks or months ...