The spring equinox and the sun's solar cycle could bring views of the northern lights, also known as the aurora borealis, this March.

This story was updated to add new information. Spring has sprung, bringing warmer days and blooming flowers. Thursday is the first day of spring, or the vernal equinox, in the Northern Hemisphere.

But for those dealing with seasonal allergies, spring can bring itchy eyes and throats, runny noses and lots of sneezing. This spring will be particularly difficult for 106 million Americans who ...