What else did we leave on the moon? Smarter Every Day explains

Could an edible computer be in your future? Researchers are currently working on several of the components you find in them, from batteries to circuit boards to logic gates.

Usually, the 160,000 kilometers of blood vessels in your body work incredibly smoothly. However, the forces of age, weight gain, and gravity can conspire to cause lumpy varicose veins.

What's the best sleeping position? Well, with all the pseudoscience to consider, it might just depend on who you are. *The graphic shows the stomach on the wrong side of the body. It should be pictured on the left side of the body, not...

Pipes can freeze in the winter, but you never hear about fire hydrants freezing. What makes them safe from the cold temperatures in winter time?

What else did we leave on the moon? Smarter Every Day explains

Tal Golesworthy is a boiler engineer -- he knows piping and plumbing. When he needed surgery to repair a life-threatening problem with his aorta, he mixed his engineering skills with his doctors' medical knowledge to design a better...

Engineering, like life, could really use a lot more cheese. This week we are looking at a cheese factory in Toronto and what it can teach us about process control systems. We’ll explore feedforward and feedback systems, and see how...

We can purge our stomachs by vomiting when we consume something that our body thinks might be harmful, but what about animals that can't?

Crocodiles have four-chambered hearts, just like we do! But, while our hearts do just fine with four valves, they have a slightly different approach…

This video is about compressed air cans (aka gas dusters) and why they get cold when you spray them. They cool off because the refrigerant inside (1,1-difluoroethane) is under pressure and boils off when the...

Paul Andersen surveys the circulatory system in humans. He begins with a short discussion of open and closed circulatory systems and 2,3, and 4-chambered hearts. He describes the movement of blood through the human heart and the blood...

NASA astronaut Nichole Ayers demonstrates how to wash your hair aboard the International Space Station. <b<br/>r/>

Credit: NASA

Howcast - Learn how to connect and disconnect the air tank on a paintball gun from paintball pro Mike "Pev" Peverill in this Howcast video.

Howcast - Learn how to relieve sinus congestion using foot reflexology techniques from certified reflexologist Chantel C. Lucier in this Howcast video.

Howcast - Learn how to relieve constipation using the colon reflex technique from certified reflexologist Chantel C. Lucier in this Howcast video.

Howcast - Check out part 3 and beat Chapter 2 of Act 1 - "Abandon Ship" with this online walkthrough for the third person action shooter "Gears of War 3".

Howcast - Check out part 45 of this playthrough for the action RPG "Dead Island" and beat "Let the Waters Flow" with this online demo.

Howcast - Learn how to replace a bike tube from Silk Road Cycles' Brendon Nicholas in this Howcast bicycle repair and maintenance video.

Howcast - Learn how to install a bike tire from Silk Road Cycles' Brendon Nicholas in this Howcast bicycle repair and maintenance video.

Howcast - Learn how to remove a bike tire from Silk Road Cycles' Brendon Nicholas in this Howcast bicycle repair and maintenance video.

Howcast - Learn to replace an old bike tire from Silk Road Cycles' Brendon Nicholas in this Howcast bicycle repair and maintenance video, part three of three.

Howcast - Learn how to replace an old bike tire from Silk Road Cycles' Brendon Nicholas in this Howcast bicycle repair and maintenance video, part two of three.

Howcast - An air mattress is great for guests or for bringing on camping trips. Get a good night's sleep and inflate your air mattress.