In Brief: Nov. 19, 2001

GYM GEM How many calories are you burning reading this magazine? Now there's a way to find out. Just breathe into the BodyGem, a hand-held gizmo that instantly measures your base metabolic rate. Armed with that information, you'll know how many calories you can eat per day and how much exercise you'll need to burn them off. The BodyGem is available at select health clubs--check www.healthetech.com to find out which ones--just in time for turkey season.

DOMAIN GAIN At the stroke of midnight last Wednesday the Web went beyond the com Now there are more than 160,000 Web addresses that end in .biz. Yes, .biz. It's one of a barrage of new domains launching this fall, including .info, which appeared in September, .museum and .name. Sorry, www.show.biz is already taken.

FISHNET A clever new screen saver adds a twist to the old virtual aquarium. Download DALiworld, available free at www.daliworld.net and gorgeously realistic angelfish, parrot fish and other sea dwellers will swim around your desktop. But don't get too attached: after a while the fish will swim away over the Internet, off your desktop and onto someone else's.

--By Lev Grossman