Doe Run, Mo

President Trump officially increased tariffs on all steel and aluminum imports to 25%. The European Union quickly announced in-kind retaliation.

Wall Street reacts to Trump's tariff flip-flopping with Canada; Reporter's Notebook: "Animal spirits" and the stock market

The $488 million Spherex mission aims to explain how galaxies formed and evolved over billions of years, and how the universe expanded so fast in its first moments.

Mark Finney studies the science behind wildfires for a living. He believes we're not heeding lessons of the past.

Humberside Police said the 59-year-old captain of container ship Solong was detained "on suspicion of gross negligence manslaughter in connection with the collision."