(AP) — Spring is almost here — officially, at least.
The vernal equinox arrives on Tuesday, marking the start of the spring season for the Northern Hemisphere.
But what does that actually mean?
As the Earth travels around the sun, it does so at an angle.
For most of the year, the Earth’s axis is tilted either toward or away from the sun. That means the sun’s warmth and light fall unequally on the northern and southern halves of the planet.
During the equinox, the Earth’s axis and its orbit line up so that both…
