The Hummingbird's Crossing

Every autumn, the ruby-throated hummingbird — a creature weighing barely three grams — launches itself from the Gulf Coast of Louisiana and flies five hundred miles of open ocean to reach the Yucatán Peninsula. No pit stops. No food. No landmarks. Just the Gulf of Mexico stretching to the horizon beneath wings beating fifty times per second. Biologists spent decades trying to verify this was even possible.…