DIY Prosthetics: The Extreme Athlete Who Built a New Knee
Brian Bartlett lost his leg at 24. He now has one of the most famous prostheses in the world. Rose Eveleth meets the man who just wanted to ski again When Brian Bartlett was 24 he was hit by a car from behind so hard it ripped his right leg off instantly. It all happened…
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Rose Eveleth
The Difference Between Hard and Soft Wood Has Zero to Do With Hardness
Generally speaking, wood is often put into one of two categories- hardwood and softwood. But what exactly makes a given piece of wood qualify as either hard or soft and how did those definitions come about? Perhaps the most important and misunderstood aspect of defining wood as either hard or soft is that it has…
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Karl Smallwood - TodayIFoundOut.com