The history of Harley-Davidson's V-twin (and all the nicknames, too) - MSN

The V-twin is a core element of the Harley-Davidson story. Here's the history behind Harley's most important V-twin engines ...

Panhead vs. Knucklehead vs. Shovelhead: Harley-Davidson engines, compared

The Knucklehead, Panhead, and Shovelhead are all important parts of Harley-Davidson history, each preceding the one before it ...
Farmers Weekly Interactive

Anatomy of a speed record racer – JCB’s 1,600hp Hydromax

For all its high-tech functions and the modern digital tools used to create it, there is something comforting about the use ...
ahajournals.org

Transcatheter Aortic Valve Replacement With Balloon- Versus Self-Expandable Bioprostheses for the Treatment of Bicuspid Aortic Valve Stenosis

Differences between balloon- and self-expandable transcatheter heart valves (BE-THVs and SE-THVs, respectively) may influence the outcomes of transcatheter aortic valve replacement for bicuspid aortic ...