nanograms/ml
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A new UBC study reveals that the brighter the orange on a male guppy, the more virile it is, solving a long-standing evolutionary puzzle about their flashy colours.
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Low THC levels not linked to increased risk of car crashes
New research led by the University of British Columbia suggests that THC levels less than five nanograms/ml of blood do not lead to an increased risk of causing car crashes in most drivers.
