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Males No Longer Needed
An ant native to Central and South America has done away with males, researchers in Texas and Brazil confirm. Scientists suspected that Mycocepurus smithii reproduces asexually; new tests show that queens don't use sperm to fertilize their eggs. Without males to keep the gene pool diverse, though, the ants could accumulate enough mutations to go extinct.
Learn more about the ant Mycocepurus smithii at the Encyclopedia of Life.
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The spectacular sights of the cosmos are now as easy to see as the stars above, with the 18 lavishly illustrated lectures of A Visual Guide to the Universe, produced in partnership with the Smithsonian. Orbit Saturn, search for water and life on Mars, and witness an armada of space telescopes uncovering the secrets of the cosmos.
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