Chile's Humboldt penguin could be facing extinction, experts warn

The Humboldt penguin population along the central coast of Chile has drastically declined, with scientists finding only one breeding pair this year compared to 842 last year, putting the species at risk of extinction according to experts.

New report ranks the most polluted places in the U.S.

The American Lung Association says 131.2 million people – that’s 39% of Americans – live in communities with failing grades for levels of pollution. Here's a map of the best and worst.