In a “normal” electrocardiogram (ECG), the transition of the QRS axis in the precordial leads occurs between leads V 3 and V 4 (i.e., there is a dominant S in V 3 and a dominant R in V 4).

Researchers have made a reversible rotor that sits on a ruthenium atomic cal bearing. Nature Nanotechnology – Controlled clockwise and anticlockwise rotational switching of a molecular motor The ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

IF THE HANDS of dial clocks swept over their faces the other way around, that would be the direction known as “clockwise”. And they would tell the hour just as faithfully. It is convenient to have all ...

Discover the mind-blowing science behind a screw that works both clockwise and counterclockwise. Learn how its unique design makes direction irrelevant and explore the fascinating physics behind it!