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 Iberian Peninsula — that massive piece of Europe holding Spain and Portugal — is not the static landmass we imagine. It’s rotating clockwise at a pace too small for humans to feel, yet large ...
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Colliding Tectonic Plates Are Making the Iberian Peninsula Rotate Clockwise
Learn about new earthquake and satellite data that has revealed the Iberian Peninsula is slowly on the move.
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