It’s low tide around North Uist, a remote island off the West Coast of Scotland. Dark tendrils of seaweed lie glistening on the rocky shore, and a lone figure in orange waders moves methodically ...

What is iodine? Iodine is a trace element found in seawater and in some soils — mostly in coastal areas. A French chemist accidentally discovered it in 1811 when an experiment with seaweed ash created ...

A French chemist accidentally discovered it in 1811 when an experiment with seaweed ash created a purple puff of vapor. The name iodine comes from a Greek word meaning violet-colored. Later that ...

A French chemist accidentally discovered it in 1811 when an experiment with seaweed ash created a purple puff of vapor. The name iodine comes from a Greek word meaning violet-colored. Later that ...