A pair of American Vought F4U Corsair aircraft in flight during World War II.

UFO sightings by aircrews during World War II.

A woman with her luggage at the airport

A woman posting to a blog using a personal digital assistant during a business meeting

Artist's concept of NASA's Curiosity rover tucked inside the spacecraft's backshell.

An American B-17 Flying Fortress shot down during World War II.

The sky crane maneuver during the descent of NASA's Curiosity rover.

An Archaeopteryx landing on a rock during the Jurassic Period.

A businessman pointing at a pie chart during a presentation and a businesswoman taking notes

Flora & Fauna - line art - a 19th century engraving Animal - mammal - the class Aves Bird Willow Wren A small, primarily dark-brown song-bird that can be found from Canada to Tierra del Fuego at the southernmost tip of South America. During W. W. II and f

Flora & Fauna - line art - a 19th century engraving Animal - mammal - the class Aves Bird Yellow Wren A small, primarily dark-brown song-bird that can be found from Canada to Tierra del Fuego at the southernmost tip of South America. During W. W. II and f

Flight attendant welcoming and pointing the way to travelers

Inside of cockpit during flight.