You’ve probably heard that strong, small magnets are dangerous for children. You would not give a toddler a neodymium magnet for any reason; ... it can’t be a very strong magnet.

Very strong magnets made from neodymium-iron-boron, which are shiny and silver in colour, ... The small 8g magnets tested interfered with all of the patients' devices, regardless of their make or type ...

Super-strong magnets are still sold as desk toys, and children are swallowing the small high-powered magnets, which can lead to serious injury and death. Consumer Reports explains how how to avoid ...

The combination of those very small magnetic fields makes a bigger magnetic field — so the material becomes a magnet. Many of the magnets used in everyday life, like refrigerator magnets, are ...

"Some of these magnets can pop out very easily, and these are the ones that I'm most concerned about," Martin said. "But any magnets, any small magnets that are pretty strong are a concern to ...

There are a few ways to do this, but the Halbach array, as [wannabemadsci] explains, allows you to make an array of magnets where one side is very strong, and the other side is very weak.