Twelve years ago, Senator Sherrod Brown, the Ohio Democrat, took the stage at his election …
Read More »Sperm Can’t Unlock an Egg Without This Ancient Molecular Key
They’re the original odd couple: One is massive, spherical and unmoving. The other is tiny, has a tail and never stops swimming. Yet the union of egg and sperm is critical for every sexually reproducing animal on Earth. Exactly how that union occurs has long been a mystery to scientists. …
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