Why mice have longer sperm than elephants

In the animal world, if several males mate with the same female, their sperm compete to fertilize her limited supply of eggs. Longer sperm often seem to have a competitive advantage. However, a study now reveals that the size of the animals also matters. The larger the animal, the more important the number of sperm is relative to sperm length. That’s why elephants have smaller sperm than mice.

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Global task force tackles problem of untreatable cancers and disease relapse: Non-toxic chemicals in plants and foods may be key

Many cancer therapies are highly toxic, and even when they appear to work, a significant percentage of patients will experience a relapse after only a few months.  Typically these relapses result from small subpopulations of mutated cells which are resistant to therapy, and doctors who try to address this problem with combinations of therapies find that therapeutic toxicity typically limits their ability to stop most cancers.

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