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Sperm Warfare (Or: Why it Takes 1 Billion Sperm to Make One Zygote)
The average man produces roughly 525 billion sperm cells over his lifetime and releases, in one way or another, more than one billion of them per month and anywhere from 40 million to 1.2 billion in a...
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Egg Cell
Egg Cell – $8.95 What do you give the Mom who has everything? How about a plush Egg Cell from the NeatoShop. A toy Ovum really is the perfect way to say thanks for being such a good sharer. Be sure to...
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Mammoth Cloning "within 5 years"
Scientists know how to do it. Cloning the extinct mammoth is just a matter of inserting mammoth DNA into an elephant egg cell, prodding it to divide into more cells, and implanting it into an elephant...
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How Do Baby Birds Breathe Inside Their Eggs?
David De Lossy/Thinkstock You might not realize it while you’re frying them sunny side up on a Sunday morning, but chicken eggs (and those of other birds, and reptiles) are some pretty sophisticated...
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