Travelers at LaGuardia Airport in New York got quite the wake-up call on Monday morning when a raccoon fell from the ceiling ...

The animals have not been used as test subjects since 2015, when the NIH retired chimpanzees from invasive research.

"Many of the staff dressed in their best pirate outfits and enjoyed decorating their cafeterias with the theme. Some even gave out prizes from their Treasure Chest to students.

Their population climbed from about 50 to near 800, but advocates say climate change threatens this conservation success story.