How Cities Shape Natural Selection
We know birds raise their voices to make themselves heard in the noisy big city, but for the first time there is evidence that they may even be evolving as a result of city living.
Dominique Potvin of the University of Melbourne, Australia says: "Urban birds might be becoming genetically distinct, which is the first step towards becoming a new 'urban' species." Unlike rural areas, towns have constant background noise, as well as buildings that reflect and distort sound. Since male birds use songs to defend their territories as well as to attract females, the urban din can cramp their style. "Whether a species can survive in urban habitats depends on whether or not it can adapt acoustically," says Potvin.
A federal judge ruled that the Trump administration likely violated the reporter's Fifth Amendment rights when it stripped his press credentials earlier this month.
- Acosta will be allowed to return to the White House on Friday.
- The judge described the ruling as narrow, and didn't rule one way or the other on violations of the First Amendment.
- The case is still open, and the administration may choose to appeal the ruling.
Progressive America would be half as big, but twice as populated as its conservative twin.
- America's two political tribes have consolidated into 'red' and 'blue' nations, with seemingly irreconcilable differences.
- Perhaps the best way to stop the infighting is to go for a divorce and give the two nations a country each
- Based on the UN's partition plan for Israel/Palestine, this proposal provides territorial contiguity and sea access to both 'red' and 'blue' America
The definition of a kilogram will now be fixed to Planck's constant, a fundamental part of quantum physics.
- The new definition of a kilogram is based on a physical constant in quantum physics.
- Unlike the current definition of a kilogram, this measurement will never change.
- Scientists also voted to update the definitions of several other measurements in physics.
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