On a late-summer flight over northern Alaska’s Brooks Range, stretches of river that should look like glass suddenly appear ...

Add Yahoo as a preferred source to see more of our stories on Google. (David Muir/Stone/Getty Images) There are several good reasons gold is one of the most valuable metals on Earth. Not least of ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Curious Kids is a series for children of all ages. If you have a question you’d like ...

There are several good reasons gold is one of the most valuable metals on Earth. Not least of those is its glistening shine. Unlike many other metals, gold is extremely resistant to rust, tarnish, and ...

Imagine leaving your shiny metal bicycle outside in the rain. As water pools on its surfaces, oxygen from the air lingers nearby, and together they begin to quietly attack the metal. The iron in the ...