#Magnetic field

Author: Carolyn Gramling / Source: Science News The smallest planet in our solar system has a massive solid inner core. In its final trip around Mercury before crash-landing in 2015, NASA’s MESSENGER mission zoomed in close to the planet, enabling scientists to make detailed measurements of its

Author: Maria Temming / Source: Science News for Students Birds, fish and some other creatures can sense Earth’s magnetic field. This ability is known as magnetoreception (mag-NEE-toe-ree-SEP-shun). Many creatures use it navigate. Scientists have long wondered whether humans can do this, too.

Author: Lewin Day / Source: Hackaday The common magnetic loudspeaker is, fundamentally, a fairly simple machine. A static magnetic field is generated by a permanent magnet, and a membrane is mechanically connected to a coil. When a varying electrical current is passed through the coil, this

Author: Tom Nardi / Source: Hackaday You never know what kind of wonders you’ll find on eBay, especially when you have a bunch of alerts configured to go off when weird electronic devices pop up. You may even find yourself bidding on something despite not being entirely sure what it is. Perhaps

Author: Dan Maloney / Source: Hackaday Have you ever wondered how switchable magnets work? Not electromagnets, but those permanent magnet fixtures like the ones that hold dial indicators to machine tools, or the big, powerful chucks for surface grinders that can be mysteriously demagnetized at