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 ...

The National Weather Service officially ranked the tornado Sunday, April 15 as an EF2. It maintained that strength, as it crossed 30 miles into Greensboro and then Rockingham County. While we've ...

Winds always rotate in a counterclockwise sense around hurricanes in the Northern Hemisphere. Winds in tornadoes usually rotate counterclockwise, but in perhaps five percent of tornadoes, clockwise ...

Discover the mind-blowing science behind a screw that works both clockwise and counterclockwise. Learn how its unique design ...

Tornadoes do occur in the Southern Hemisphere, albeit at a greatly reduced frequency than in the Northern Hemisphere, primarily because it includes the U.S., which hosts about 75 percent of the ...

FARGO — About 98% of all tornadoes spin cyclonically, which in the Northern Hemisphere is counter-clockwise and clockwise in the Southern Hemisphere. This is because tornadoes tend to follow the ...

Spiral galaxies imaged by JWST that rotate in the same direction relative to the Milky Way (red) and in the opposite direction relative to the Milky Way (blue). The number of galaxies rotating in the ...