Dec 29

Humans aren't the only species that tend to belt out a drunk song or two after consuming alcohol -- songbirds will get in on the act as well. But first, scientists had to get them drunk.

Jun 10

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Costa Rica's Biodiversity

Farmers in Costa Rica are encouraged to set aside part of their land from production to help maintain biodiversity and prevent deforestation.

New estimates suggest BP's ruptured well may have spewed twice as much oil into the Gulf of Mexico before it was capped than previously thought, raising new questions about cleanup and restoration efforts. Judy Woodruff has an update on the…