A magnetic field is invisible, but it can be detected using a magnetic compass. A compass contains a small bar magnet on a pivot so that it can rotate. The compass needle points in the direction ...

The average Hackaday reader likely knows, at least in the academic sense, what a magnetic field looks like. But as the gelatinous orbs in our skull can perceive only a tiny fraction of the EM ...

Many migratory birds use Earth’s magnetic field as a compass ... appear to calculate their geographical position by drawing data from different distances and angles between magnetic fields ...

Scientists have discovered a new reason for turtles to dance for joy: Loggerhead sea turtles seem able to discern and remember magnetic field signatures, which could help them find food.

Over time, changes to this innermost layer could impact the planet’s magnetic field, which shields our world from solar radiation — and helps guide the migrations of many animals. Loggerhead ...

The Rosetta-Philae spacecraft successfully touched down on Comet 67P/Churyumov-Gerasimenko, uncovering remarkable findings during its mission. Yet, there were setbacks as Philae's tenure on the ...

It’s something [mircemk] demonstrates, with an Arduino-powered magnetic field strength meter that uses a UGN 3503U Hall effect device. The circuit is extremely simple, comprising the sensor ...

How a tokamak works: The electric field induced by a transformer drives a current (big red arrows) through the plasma column. This generates a poloidal magnetic field that bends the plasma current ...

is a non-invasive biomedical imaging technique that uses a strong oscillating magnetic field to induce endogenous atoms such as hydrogen, or exogenously added contrast agents, to emit radiowaves ...

They can use the strength of the Earth’s magnetic field to identify where they are–map sense–and where they need to go, or compass sense. “Map sense is a positional sense. It’s similar ...