Biologists at the University of Pennsylvania studying the processes of evolution appear to have resolved a longstanding conundrum: How can organisms be robust against the effects of mutations yet simultaneously adaptable ...
Evolution
Jan 20, 2010
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Researchers at the University of Pennsylvania have developed a theoretical model that informs the understanding of evolution and determines how quickly an organism will evolve using a catalogue of "evolutionary speed limits." ...
Evolution
Nov 2, 2009
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Fire is often thought of something that trees should be protected from, but a new study suggests that some trees may themselves contribute to the likelihood of wildfires in order to promote their own abundance at the expense ...
Plants & Animals
Oct 28, 2009
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(PhysOrg.com) -- Why did Barack Obama win the US election and did the fact he is over six feet tall influence the voters? The authors of a paper published in Current Biology this month argue that due to 'a hangover from our ...
Social Sciences
Oct 21, 2009
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(PhysOrg.com) -- How honest are males when using sexual displays to signal their eligibility to females?
Evolution
Aug 21, 2009
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That's one conclusion from a new study that looked at how virulence evolves in parasites. The research examined whether parasites evolve to be more or less aggressive depending on whether they are closely connected to their ...
Cell & Microbiology
May 27, 2009
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(PhysOrg.com) -- Most animals, like humans, have separate sexes — they are born, live out their lives and reproduce as one sex or the other. However, some animals live as one sex in part of their lifetime and then switch ...
Feb 2, 2009
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There could be billions of shallow lakes and ponds on Earth, though lack of mapping systems makes it hard to know just how many exist. Together, they emit significant amounts of greenhouse gases into the atmosphere, but emissions ...
Environment
Jun 5, 2023
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Fossilized bones help tell the story of what human beings and our predecessors were doing hundreds of thousands of years ago. But how can you learn about important parts of our ancestors' life cycle—like pregnancy or gestation—that ...
Evolution
Jan 26, 2023
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New studies by the Max Planck Institute for Evolutionary Biology show that competition between different evolutionary developmental stages of multicellular life cycles can be important for the development of an entire population. ...
Evolution
Sep 14, 2022
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