Discovery Channel HD Saturday

Experts explain the importance of supermassive black holes as they attempt to solve the mysteries surrounding these phenomena

Experts and theorists explore the limits of human knowledge and explain the science behind the sun

Paul Teutul Sr asks JQ and Jason Phol to build a tribute bike for the Sikorsky Aircraft Corp, but fabrication issues cause problems

The team builds a luxury bike for Mercedes Benz-AMG, and Paul Tuetul Sr asks a local artist to give him a tattoo of his children

Buying goods from home

Buying goods from home

Auto enthusiast Mike Brewer and mechanic Edd China turn their attention to a vintage 1916 Cadillac V8