Imagine a tiny, untethered needle that can enter the body through an incision no larger than a pin prick to perform biopsies, suture wounds, and even deliver cancer-fighting chemotherapy directly to ...

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 ...

A magnetometer is a device that measures magnetism: the direction, strength, or relative change of a magnetic field at a ...

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Safety note: the wire can get too hot to touch if you keep touching the terminals for too long. Can't see the video? Download an mp4 [21 MB] version of this video. Grab a compass, a coat hanger and a ...

Here's how to make a magnetic compass that points north using the amazing invisible force of magnetism. And there are only a few things that we need:A long large needle, a piece of cork carefully ...

Magnetic monopoles have provided a rich field of study, leading to a wide area of research in particle physics 4,5,6, solid-state physics 7, ultra-cold gases 8, superconductors 9, cosmology 4 and ...