(PhysOrg.com) -- Some mouse sperm can discriminate between its brethren and competing sperm from other males, clustering with its closest relatives to swim faster in the race to the egg. But this sort of cooperation appears ...
Plants & Animals
Jan 20, 2010
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(PhysOrg.com) -- Cheaters may prosper in the short term, but over time they seem doomed to fail, at least in the microscopic world of amoebas where natural selection favors the noble.
Evolution
Oct 1, 2009
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Birds are commonly thought of as being the paragon of monogamous fidelity, staying true to their mate for life. Yet, in most bird species, some nests contain offspring of individuals other than the one's tending the nest.
Evolution
Jun 3, 2009
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(PhysOrg.com) -- One of the perplexing questions raised by evolutionary theory is how cooperative behavior, which benefits other members of a species at a cost to the individual, came to exist.
Evolution
Apr 6, 2009
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(PhysOrg.com) -- Professor Roger Bland is listening in on one of the noisier creatures in San Francisco Bay, using physics to analyze the mating song of the toadfish. While fish don't have vocal chords, they have innovative ...
Plants & Animals
Mar 25, 2009
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(GPEARI, Portugal) -- Cooperation, despite being now considered the third force of evolution, just behind mutation and natural selection, is difficult to explain in the context of an evolutionary process based on competition ...
General Physics
Feb 6, 2009
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