Birds make sounds to communicate, whether to find a potential mate, ward off predators, or just sing for pleasure.

Weird and interesting facts about presidents Mark your calendars—Inauguration Day is coming up on Jan. 20, the perfect time ...

"I was trying to act cool and I think I succeeded until now, because now he can see that I was not playing it cool at all," Dennings said of meeting the former child star ...

Meet Aria, a robot with 17 motors driving her facial expressions, and AI powering her more "emotional" conversation skills.