For many years Sergeant Kevin Briggs had a dark, unusual, at times strangely rewarding job: He patrolled the southern end of San Francisco’s Golden Gate Bridge, a popular site for suicide attempts. In a sobering, deeply personal talk...

About 136,000 years ago, on a coral atoll in the Indian Ocean, there lived a flightless bird. And when this atoll was swallowed up by the waves, that bird went extinct. ... Or did it? Did the flightless Aldabra rail evolve twice?

On paper, shaping yourself a surfboard by hand would seem like a giant pain in the ass. Shaping bays are small, dusty, sweat-inducing spaces. Planer whirs are not anyone's preferred soundtrack. You'll make a lot of shit surfboards on...

Howcast - Check out this Portal 2 walkthrough and beat Chapter 1 - Part 7: We're Out of Options with this online demo.

Howcast - Learn how to do a bluntside from professional skateboarders Bam Margera and Kerry Getz in this Howcast skateboarding video.

Howcast - Learn how to do a lipslide from professional skateboarders Bam Margera and Kerry Getz in this Howcast skateboarding video.

Howcast - Learn how to do a nollie 5-0 from professional skateboarders Bam Margera and Kerry Getz in this Howcast skateboarding video.

Howcast - Learn how to do a crooked grind from professional skateboarders Bam Margera and Kerry Getz in this Howcast skateboarding video.

Howcast - Learn how to do a noseslide from professional skateboarders Bam Margera and Kerry Getz in this Howcast skateboarding video.

Howcast - Learn how to do a 50-50 grind from professional skateboarders Bam Margera and Kerry Getz in this Howcast skateboarding video.

Howcast - Learn how to do a nosegrind from professional skateboarders Bam Margera and Kerry Getz in this Howcast skateboarding video.

Howcast - Learn how to do a 5-0 grind from professional skateboarders Bam Margera and Kerry Getz in this Howcast skateboarding video.

Howcast - Learn how to do a smith grind from professional skateboarders Bam Margera and Kerry Getz in this Howcast skateboarding video.

Howcast -Learn how to make the "Time Shot Bank" shot from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn how to use side spin from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn how to make the 2-rail kick shot from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn how to make the "Machine Gun" shot from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn how to make the "Window" shot from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn how to make the "Pinball" shot from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn how to make the "Stroke Jump" shot from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn how to make the 3-rail kick shot from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn how to make the "The Hardest Straight-In Shot" from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn how to make the "Snake" shot from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn about M4 accessories from Police Officer Keith Charley in this Howcast gun video.