So your buddy with the new plasma TV won´t shut up about how great the game looks in high-def. He´s right-it is like watching a whole new sport. But you don´t have to splurge on a 50-inch flat screen to quell your HD envy. Stations across the country broadcast HD signals over the air, absolutely free. And since most laptop screens already have enough resolution to display high-def, all you need is an HD tuner that plugs into a USB port on your Mac or PC, and you can enjoy the ultracrisp picture at home or away. Let´s see Mr. Plasma do that.
How to get more stations and better reception: Depending where you live, a bigger indoor antenna, like the Zenith ZHDTV1 ($40; zenith.com), may improve your HD signal. Place it in a window and point it toward the nearest broadcast tower. Find more antenna tips at
Time: 10 Minutes
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Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.