A thin, watery layer coating the surface of ice is what makes it slick. Despite a great deal of theorizing over the centuries, though, it isn't entirely clear why that layer forms. [...]
Fall Equinox Is Coming: What to Know and What It Looks Like
Later this month, you could experience an equinox sunrise if you're up early enough. The autumnal equinox heralds the arrival of fall in the northern hemisphere. [...]