How does a magnetic compass work? Well, it’s all down to basic physics and human ingenuity. The key component of a standard baseplate compass is its magnetized needle, which is allowed to spin freely ...

Some inventions are so simple that it’s hard to improve them. The magnetic compass is a great example — a magnetized needle, a bit of cork, and a bowl of water are all you need to start navigating the ...

Earth is surrounded by a magnetic field generated by electric currents from within the planet. Compasses take advantage of this field to identify north and serve as a navigational aid. But one social ...

A protein in the retina of a migratory bird can respond to weak magnetic fields, researchers have found (Nature 2021, DOI: 10.1038/s41586-021-03618-9). The discovery suggests that the protein, ...

On Earth, the magnetic field of our planet points a compass north, but in space, things are a bit more complicated. When you purchase through links on our site, we may earn an affiliate commission.

If shrunken down to micron size, a compass needle could wobble. (Courtesy: iStockphoto/tobias machhaus) A tiny magnetic needle just 10 μm long could be used to create a magnetic-field sensor that – if ...