The hoverboard—a type of skateboard that levitates like a magic carpet—had been a pipe dream since its fictional debut in 1989’s Back to the Future Part II. Now California-based tech firm Hendo has built the real thing.

Hendo’s hoverboard can float only an inch or so above the ground, and even then only over conductive material like copper or aluminum.

But the technology that powers it could be revolutionary. Using the $450,000-plus it raised on Kickstarter, Hendo founders Jill and Greg Henderson plan to develop magnetic “hovering” tech to stabilize buildings during earthquakes, protect valuable works of art and more. “The hoverboard is the first step to bringing this technology to the world,” says Greg.

Nobody gets Mars right on the first try. The U.S. didn’t, Russia didn’t, the Europeans didn’t. But on Sept.?24, India did. That’s when the Mangalyaan (Mars craft in Hindi) went into orbit around the Red Planet, a technological feat no other Asian nation has yet achieved. Building the craft cost India just $74?million. At that price, the Mangalyaan is equipped with just five onboard instruments that allow it to do simple tasks like measure Martian methane and surface composition. More important, however, it allows India to flex its interplanetary muscles, which portends great things for the country’s space program—and for science in general.

In October, Lockheed Martin said it had achieved a technological breakthrough that will enable it to make compact fusion reactors small enough to fit on the back of a truck within a decade. The design uses “magnetic mirror confinement” to control the reaction. If Lockheed really can produce a workable fusion reactor, the world of energy may never be the same.

We already have wireless Internet and wireless phones. Why, then, are everyday appliances still shackled to the wall? To be sure, there are a few power-mat chargers for small gadgets like phones. But WiTricity, based in Watertown, Mass., is thinking big. Its technology—involving a plug-in coil that creates a magnetic field, which in turn powers objects as far away as 8 ft. (2.4 m)—has been tested on Toyota electric cars (with charging mats), Intel PCs (with charging pads) and more. Within 10 years, says CEO Alex Gruzen, rooms could be wired so that all appliances—lamps, TVs, stereos—pull power from a central charging base.

A machine that can build any object. It sounds like a sci-fi fantasy, but thanks to the rise of 3-D printers—devices that can build objects from digital blueprints, usually by layering plastic or other materials—it is rapidly becoming reality.

That’s a boon for consumers and corporations alike. In the past year alone, middle-school students have 3-D-printed stock cars for physics lessons, scientists have 3-D-printed tissues for human organs, and GE has used 3-D printing to improve the efficiency of its jet engines. “This is one of those technologies that literally touches everything we do,” says Avi Reichental, CEO of 3D Systems, whose 3-D printers produce candy (as shown above) and musical instruments, among other objects.

Most smart watches have proved to be anything but: they try to shrink down the experience of using a cell phone, with clunky results. Apple’s Watch, by contrast, wholly reimagines the computer for the wrist, using a novel interface that combines a touchscreen and physical buttons. Besides telling time, the Watch can send messages, give directions, track fitness and make wireless payments. It’s also an attractive piece of fashion, with high-end Edition models that feature 18-karat gold.

Nearly half of Americans don’t feel safe sharing private information over a cell-phone call, according to Pew. So how can phone owners conceal their data? Enter the Blackphone, a smartphone designed to put privacy above all else. The device runs a customized Android operating system stripped of features that might make data vulnerable, like calendar sync. But even with a Blackphone, users should be careful about what they type or upload. As Blackphone CEO Toby Weir-Jones explains, “It’s dangerous to assume anything is a magic invisibility cloak.”