Apples ‘n’ pears

 The best of the rest form the physics preprint server this week:

A Novel Mechanism for Outbursts of Comet 17P/Holmes and other Short-period Comets

The Production Rate and Employment of Ph.D. Astronomers

Expanding and Improving the Search for Habitable Worlds

The Price of Anarchy in Transportation Networks: Efficiency and Optimality Control

Extinction risk and structure of a food web model

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