Sources

david carr: RT @alexismadrigal: The Case of the Disappearing Pigeons. http://t.co/KOnLQTqp Infrasounds, bird navigation, & the mystery of Jersey ...

Alexis C. Madrigal: The Case of the Disappearing Pigeons. http://t.co/KOnLQTqp Infrasounds, bird navigation, & the mystery of Jersey Hill

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