In which Hank has trouble saying things and asks the real tough questions. -- Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want...

Today Hank talks about the deliciousness of alkenes & alkynes, their structures, and how to remember which is which by simply knowing the alphabet. Also, he breaks down hydrogenation, halogenation,...

This Old House plumbing and heating expert Richard Trethewey installs a new washing-machine valve that will prevent flooding. SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse...

This Old House landscape contractor Roger Cook heads to Miami to plant several varieties of palm trees in a front yard. (See below for shopping list, tools, and steps.) SUBSCRIBE to This Old...

This Old House plumbing and heating expert Richard Trethewey installs a device that will heat a pool with the heat produced by an air conditioner. (See below for a shopping list, tools, and...

This Old House general contractor Tom Silva helps a homeowner repair a cracked floor joist. SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse Shopping List for Repairing a...

Ask This Old House lighting expert Scott Caron gives Kevin a tutorial on electrical testers to make sure you never work on live wires. #ThisOldHouse #AskTOH SUBSCRIBE to This Old House: http://bi...

Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner reattach an undermount kitchen sink to a granite countertop. (See below for a shopping list, tools, and steps.)...

This Old House plumbing and heating expert Richard Trethewey demonstrates some common plumbing mistakes and how to avoid them. (See below for tools and steps.) SUBSCRIBE to This Old House:...

Ask This Old House Host Kevin O’Connor shows a new mom a few tips to keep her baby safe around the house by using cabinet locks, a baby gate, outlet covers, and securing a television. (See...

Ask This Old House general contractor Tom Silva explains the best ways to keep your roof and gutters free from those dreaded ice dams. (See below for a shopping list and steps.) SUBSCRIBE...

Ask This Old House landscape contractor Roger Cook gives tips on how to keep a snow blower running through every storm. (See below for a shopping list, tools, and steps.) SUBSCRIBE to This...

Ask This Old House heating and plumbing expert Richard Trethewey explains the best practices for keeping your furnace up and running during the winter. (See below for a shopping list and steps.)...

Electrician Scott Caron hangs a flat-panel TV on the wall and conceals all the wiring. #ThisOldHouse #AskTOH SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse Shopping List...

Ask This Old House landscape contractor Roger Cook uses grass pavers to transform a patch of grass into a lawn a homeowner can drive on. SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldH...

Ask This Old House plumbing and heating expert Richard Trethewey offers a few tips to keep water from freezing up in your pipes during the winter months. SUBSCRIBE to This Old House: http://bit.ly...

In which John Green forgets his lines, is interrupted by airplanes, ad-libs some jokes, and Stan proves himself ignorant of pop culture. Crash Course is on Patreon! You can support us directly...

Did you know that Polymers save the lives of Elephants? Well, now you do! The world of Polymers is so amazingly integrated into our daily lives that we sometimes forget how amazing they are....

Ask This Old House master electrician Scott Caron helps a homeowner replace a lamppost light in his driveway. (See below for a shopping list, tools, and steps.) SUBSCRIBE to This Old House:...

In this final episode of Crash Course Chemistry, Hank takes us on a tour of The Global Carbon Cycle and how it all works. From Carbon Fixation to Redox Reactions, it s all contained within!...