Here’s a really neat animation that reveals how a chainsaw works. The piston inside powers the three-row shark teeth chain of blades at 70mph! We get to see how the hundred of parts come together in ...

Thoracic aortic dissection occurs when the intima of the aorta becomes compromised and “tears” or “dissects” a new layer that fills with blood between the intima and the media. This “false lumen” can ...