Historically, those devices have functioned with the aid of mercury, as the metal fluid is directly impacted by the amount of pressure in the air, though fluid-less aneroid barometers have also ...

In a brief game of cat-and-mouse, activists erased the stars from the Washington, D.C., flag painted on the street, creating the image of an equal sign; they temporarily changed the message to ...

It's a win-win, and it's why everything on iStock is only available royalty-free — including all Barometer images and footage. What kinds of royalty-free files are available on iStock? How can you use ...