The collection plate and a plate of dog treats makes the rounds after the Sunday services at Covenant Presbyterian Church in Los Angeles. Richard Vogel/AP hide caption

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Lioness Sabrina (foreground) walks in her pen at the Gaza Zoo with her brother, Sakher, in 2007. The two lions are among the few animals at the zoo that survived the Israeli offensive against Hamas militants nearly a year ago. Hatem Moussa/AP hide caption

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North America was once home to mammoths, mastodons (above) and beavers the size of black bears. Barry Roal Carlsen/University of Wisconsin-Madison hide caption

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A snowy tree cricket feeds on a leaf from a mountain dalea plant. Gerardine Vargas hide caption

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Wild Sounds

Slo-Mo Cricket Chirps Reveal Secret Serenades

The slight differences in the patterns of cricket chirps are undetectable to the human ear, but may actually determine how crickets recognize their own kind.

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Olive Ridley turtles come ashore to lay their eggs on La Escobilla beach in Oaxaca, Mexico, one of the most important nesting grounds in the world for the creatures. Before the Mexican government instituted a ban on their slaughter, Olive Ridley turtles were harvested nearly to extinction. Jason Beaubien/NPR hide caption

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