There is a scene in Dances with Wolves after Costner's character has arrived at the deserted Dakota base in which he discovers the company's garbage pile. He gives it a disappointing, scrutinizing look as he recognizes it's another harbinger of what is to come for the plains and its people. Fast forward 150 years to a different kind of frontier: space, in near-Earth orbit. There, we find a similar garbage pile, only this one is traveling at 30,000 miles per hour and threatens all the satellites and telescopes and space stations floating about.

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European travelers may soon have a chance to chat away on their own phones while in flight. For the new system to work, planes would be outfitted with small mobile base stations known as pico cells. The cells would be switched off during take-off, and turned on once the planes reach a given altitude, which would be a minimum of 3,000 meters. Phone signals would be routed to the mobile base stations, which would in turn dispatch signals to ground-based networks through a satellite link.

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Six weeks ago, the Monterey Bay Aquarium released a young white shark into the ocean, and the swimmer has already cruised down the coast to the waters off Mexico.

The shark, which spent 162 days at the aquarium after it was accidentally caught by a local fisherman, is the first to carry two different tracking tags.

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By now you've probably heard the strange story of USA 193, the out-of-control military satellite slated to be shot out of the sky this evening. Amidst controversy over the safety and necessity of the mission, the U.S. Navy is planning to launch a $10-million missile from the USS Lake Erie somewhere west of Hawaii as early as 9:30pm EST and take the school-bus-sized sat down.

Launched in December 2006 by the ultra hush-hush National Reconnaissance Organization, the rogue satellite sported a powerful imaging sensor and a central computer that failed almost immediately. Its orbit began to decay, gradually and then suddenly. And when it became clear that the satellite would plummet to Earth this week, the government grew concerned that its 1,000 pounds of onboard fuel would survive the plunge and pose a health risk to anyone who came in contact with the hydrazine gas. That's their side, anyway—and their explanation for preparing three SM3 anti-ballistic missile interceptors to shoot the bugger down from an Aegis destroyer.

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It started out as a 10-ton satellite packed with hazardous materials plummeting towards Earth. Then it dropped down to 4 tons, and the materials turned out not to be hazardous. Details are still sketchy, but it now seems clear that the NROL-21 USA-193 satellite that failed just hours after its December 2006 launch is now on its way back down to Earth. Should we be worried?

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XSS-11 is an experimental Air Force technology demonstrator designed to track other satellites. Controllers simply tell the spacecraft where to look for a piece of orbiting hardware–another U.S. satellite, for instance–and the XSS-11 autonomously plots a course, accelerates to the object, and begins to orbit and observe. It's the first step toward automatic satellite inspection and repair.

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In 2004, Matthew Teague traveled to Arthur C. Clarke's Sri Lankan home for a Popular Science profile. They candidly discussed Clarke's incredible legacy as well as his insatiable thirst—even at age 87—for the next Big Idea. Here we present again this feature in tribute to a man whose visions still continue to profoundly influence the world of science and technology today.

The gate to Arthur C. Clarke's compound stood tall, white and blast-proof. We ran our hands over its surface, poking around for some secret doorbell. "Hello? Can anybody hear us?"

I wasn't trespassing—I'd called ahead, and Clarke agreed to see me, apparently curious why an American would track him down to this doorstep in Sri Lanka, the tiny, troubled island nation off the coast of India. But the place spooked Thilac, my Sri Lankan driver. "Maybe wrong house," he said, looking around. "OK?"

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