Earth’s surface bears the scars of obvious catastrophes, from dinosaur-killing craters to lava fields, but a growing body of ...

When we think of tails in space, comets instantly come to mind, glowing streaks slicing across the night sky. But NASA says comets are not alone. Our own planet, Earth, quietly drags a vast and ...

When we were kids, “invisible ink” meant lemon juice on notebook paper, write the message, and to see it someone would have to hold it up to the light for the words to appear. Otherwise, it just ...