A World War I-era warhead and a dead blacktip shark attached to a metal hook are just some of the things magnet fishers have retrieved around the U.S. since the hobby spiked in popularity following ...

Rare-earth elements are a set of metallic elements in the periodic table. Chemists usually refer to a group of 17 elements when they use this label: the 15 lanthanides from lanthanum to lutetium, and ...