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).

In our solar system, nearly all planets follow a specific pattern. As they move around the Sun, they also spin on their own axes. Most of these planets rotate in an anticlockwise direction. This ...

Hurricanes spin counterclockwise (like all low pressure centers in the northern hemisphere) because of the Coriolis Effect. Because the equator rotates faster than other areas of the Earth's surface, ...

From space, the Iberian Peninsula – primarily occupied by Spain and Portugal – looks like an immovable solid block of land anchoring southwestern Europe. But beneath that apparent stability, the ...

The Iberian Peninsula is slowly rotating clockwise, scientists revealed in a recent study that sheds light on how the Earth is moving beneath southwestern Europe. Spain and Portugal have both suffered ...