Magnets can attract some metals, but not all of them. Metals such as iron and steel are magnetic, which means they are pulled towards a magnet. Other metals, like gold, silver and aluminium are not ...
WASHINGTON -- Dr. Demetrius Lopes snaked a thin wire with a tiny magnet on its tip into an artery in Paul Kelsey's groin and threaded it all the way up into his brain. Aided by a helmet-shaped magnet ...
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