Bat wings have intrigued scientists for centuries. And now, engineers have created “Bat Bot,” a small aircraft that mimics the flight patterns of the small, rodent-like flyers. Bat Bot exposes the complicated mechanics of bat flight and simultaneously provides clues…

By Andrew Wagner

CHICAGO — Republican presidential candidate Donald Trump canceled one of his signature rallies on Friday, calling off the event in Chicago due to safety concerns after protesters packed into the arena where it was to take place.

By Jill Colvin and Michael Tarm, Associated Press