You're about to find out how to weigh a floating object without scales, which is also an excuse to splash around a bit and make some mess. And here's everything you'll need; a measuring jug, an ...

New Caledonian crows can tell how heavy an object is simply by seeing it sway in the wind, researchers have found. The experiment makes crows the first creatures other than humans to have the ability.

Barry Lienert, a geophysicist at the University of Hawaii, provides the following explanation. We start by determining the mass of the Earth. Issac Newton's Law of Universal Gravitation tells us that ...