Fireworks are a cornerstone of America's Fourth of July celebrations, but that can make the spirited holiday dangerous.

The Northern Hemisphere's spring — or vernal — equinox can land between March 19 and 21, depending on the year. Its fall – or autumnal — equinox can land between Sept. 21 and 24.

Did you know that some of the oldest human-made structures on Earth align precisely with the rising sun on the summer ...

The saguaro cactus is the iconic plant of the Arizona borderlands, and in June and early July, its fruit ripens ...