metallic

The unnamed attendant and two colleagues initially thought the noise to be an angry visitor, but it was not a normal sound: "It was a dull, slightly metallic noise."

Like Pakucko, Gleuck recalled suffering health effects during the blowout, including a tightness in her chest and a metallic taste in her mouth that dissipated when she left the area and resumed when she returned.

Treasure has a variety of definitions, including any object at least 300 years old when found which is not a coin but has metallic content of which at least 10% by weight is precious metal.

"Researchers have been looking at the ways these atomic arrangements change metallic properties -- a big one is catalysis," Freitas says of the process that drives chemical reactions.

In heavy rain, Quentin Martinez followed a flooded path to a pool in a forest clearing and captured the metallic sheen of lesser tree frogs gathering to breed.