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Ancient Roman coins turn up in Japanese ruins

A haul of coins from halfway across the world turned up on an archaeological site in Japan. Exactly how they got there is a fascinating mystery.

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Check out DARPA's new podcast -- so far, no insane killer robots

The government agency that brings you new military tech, now brings you its first podcast: "Voices from DARPA."

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A visual look at Elon Musk's plan to move us to Mars (pictures)

The SpaceX founder has an audacious plan to build the first Martian metropolis, and he just might have the rockets to pull it off.

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Let's fill a toilet with 240 pounds of mercury and then flush it

A YouTube channel dedicated to unusual science experiments takes a bathroom break with a special toilet system and a whole lot of liquid mercury.

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Elon Musk reveals grand plan to colonize Mars​

SpaceX CEO Elon Musk ​unveils his ambitious plan to inhabit Mars and shows a concept video of the interplanetary transport system he's designing for the mission.

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CraveCast can't wait to crew a Mars mission with Elon Musk

The SpaceX CEO has announced his plan to make humans a multi-planetary species. Who will be the first to volunteer among us? The crew discusses our Martian future. Join us at 3 p.m. PT today.

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Elon Musk unveils epic SpaceX plan to colonize Mars

The SpaceX CEO says in case of a doomsday event, we need to be prepared to go to Mars. Why Mars? It's better than the "hot acid bath" of Venus, he says.

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The fastest a human can bicycle is now 89.59 mph

Just so long as they're riding AeroVelo's weird-looking, record-breaking Eta bike.

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VideosSee all videos

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Robotic tumbleweeds will explore the galaxy for us

Because what would a frontier be like without 'em?

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Wee Mercury is getting even smaller

The solar system's smallest planet is still tectonically active.

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<p>Mawrth Vallis is one of the biggest valleys on the Red Planet.</p>

Gorgeous Mars valley was 'once a potentially habitable place'

See a fresh view of the ancient Mars valley that intrigues scientists and could be the landing site for a new Mars mission.

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Stargazing on an old cowboy trail (pictures)

Welcome to the darkness of Datil, New Mexico, a remote town bordered by a radio observatory and topped by a nighttime light show of spectacular stars.

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THIS SMART IRON COST $1000

How much do you hate wrinkled clothes?

A Swedish company known for its high-end ironing systems will soon begin to sell a smart iron that costs more than $1,000.