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).

The Sun's counterclockwise rotation (as viewed from its north pole) originates from the initial spin of the solar nebula, a remnant of the larger cloud from which it formed. The direction of this spin ...

Scientific research utilizes animals to better understand specific illnesses and therapeutics and their physical and psychological impacts. Scientists commonly use rodents because of their biological ...

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!