The world’s most expensive lawn mower.

This amazing footage shows a flock of 3000,0000 birds swarming Denmark in on massive, shape-shifting cloud. Fout at Holy Kaw! via Huffington Post via BuzzFeed via LiveLeak.com.

The “Lightcraft” is a laser-propelled spacecraft concept that could ultimately run on other beamed energies, such as microwave. Found at YouTube from SpaceRip via Current.

An aerial video crew observed the October 28, 2009 Ares I-X test flight from a Cessna Skymaster aircraft positioned approx. 10 nautical miles away from the vehicle at an altitude of 12,000 feet. Found at YouTube from NASATelevision.

Imagine falling out of a plane, on purpose, and heading toward the ground at 120 mph. Welcome to the world of skydiving. The United States Parachuting Association estimates that about 350,000 people complete more than 3 million jumps in a typical year. Find out all about this insanely popular sport. Found at YouTube from HowStuffWorks.

Do flightless birds dream of flying? Nicely done student animation. Found at YouTube from Madyeti47.

This is some truly amazing footage of James May riding in a U-2 spy plane to the edge of earth. Found at Break from bigband.