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Launching a new brand is expensive. Far easier, these days: Bring back (or polish up) an old one. "At one point , we were going to call ourselves 'The Re Company,'" says Mark Thomann.

Here's a brief recap of a few of the more creative start-ups (and hair styles) from last evenings Demo Day at General Assembly. Matt Brimmer, co-founder of General Assembly , the location of last night's 500 Startups Demo Day in New York, couldn't announce how many people showed up for the event. Or not that he couldn't, but that he wouldn't—Brimmer didn't want to get in trouble with the landlord for clearly exceeding the office's maximum capacity

Researchers at the University of California and the Samsung Advanced Institute of Technology in Korea have been looking at the technology for two years now, and have come up with a proof-of-concept design that really could result in smell-o-vision, TV that pumps out odors to heighten to your immersive-TV experience. Nasal nostalgia is made possible by your brain's hippocampus --where long-term memories get sorted out--and it seems it's a very primal instinct, which may explain its power. You know what I mean: The way an unexpected whiff of scent will spark off memories of a long-forgotten partner