Space

James Mattis accepts tactical retreats to retain influence with Donald Trump. But the losses are piling up.

The U.S. president's plan could put him at odds with his defense secretary.

Privately funded space ventures are altering the industry … and, maybe, the final frontier itself.

Space nations, UFOs, and Mars colonies are on the wish list.

And the United States is losing.

Experts doubt a coherent space policy from the Trump administration.

And then Mars, obviously.

Where Congress sees security risks, private industry sees opportunity.

Geopolitics are their own gravitational force.

Hopefully a few of the planets have oil so we can invade them.

A super-powered micro-animal, a hacker-proof grid, and more.

The clandestine celestial war between superpowers isn't over. It's just getting more high-tech.

The passing of a hero reminds us of a time when America’s leaders and aspirations inspired us.

Silicon Valley wants to explore space as tech entrepreneurs. We should be traveling as pilgrims.

Plus, a sub that stays dry, a B2-inspired battery, and a DNA scanner that catches poachers red-handed.

Do you enjoy the unexpected setbacks of megalomaniac billionaires?

A naval laser light show, a cactus-inspired hydrogen car, and a new way to keep space clean.

U.S. companies are preparing to tap the solar system’s riches. But will they share the trillion-dollar deep-space market with hungry foreign competitors?

The best stories from around the world.

Chinese officials announced Tuesday that more than 9,000 people would be relocated to make way for a massive telescope.