As highly transmissible coronavirus variants sweep across the world, scientists are racing to understand why these new versions of the virus are spreading faster, and what this could mean for vaccine efforts. New research says the key may be the spike protein, which gives the coronavirus its unmistakable shape.
Video: Here’s why COVID mutant variants are spreading so fast
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Infographic: Growing human embryos — How long should researchers watch human development play out in a dish?
In May, the International Society for Stem Cell Research (ISSCR) released new guidelines that relaxed the 14-day rule, taking away ...
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