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3.14159265358979 Time to dust off your old math books: This Sunday, March 14, is Albert Einstein's 131st birthday and Pi Day, in honor of the numeric approximation of the irrational number pi, which represents the ratio of any circle's diameter to its circumference. A number of Princeton-area merchants will have pi-themed specials and events, and there will be pie-judging and pi-recitation contests at the Princeton Public Library. Mimi Omiecinski of the Princeton Tour Company will offer $3.14 Einstein tours all day. And just in time for the celebration, Princeton scientists have revealed a new application of Einstein's theory of general relativity. See U.S. 1 Newspaper for details on the day's festivities and a look at Princeton's most celebrated scientist.	WHAT'S HAPPENING IN PRINCETON, NJ? TODAY'S EVENTS TOMORROW'S EVENTS ALL FUTURE EVENTS Weekend Warrior: Had it up to here with all the snow this year? Tired of being stuck in the house with the kids? Then gather your girlfriends and head out to the Girlfriend Getaway Weekend, Saturday and Sunday, March 27 and 28, noon to 5 p.m. at Hopewell Valley Vineyards in Pennington, where you'll find jewelry vendors, crafters, cheese and chocolates and spa products, and of course, wine! Read what our food writer Pat Tanner has to say about Hopewell Valley Vineyards. And it costs only $5. IN THEATERS No one's quite sure what happened when the actors leave the stage following a performance of "The Great American Backstage Musical" at Off-Broadstreet Theater in Hopewell, but that's what makes it fun, writes U.S. 1's Jonathan Elliott. See for yourself: It's playing through April 3. Playing through March 20 at New York's Acorn Theater, the revival of Sam Shepard's "A Lie of the Mind" is a must-see, U.S. 1's Simon Saltzman writes. The New York Times' Ben Brantley gives a similarly glowing review. Time Out New York reviewer David Cote, however, is not nearly as impressed. For the latest from PrincetonInfo: Subscribe to our RSS feed. TRAFFIC\|\|DIRECTIONS\|\|WALKING TOURS WEATHER \|\| NEWS \|\| MOVIE LISTINGS
MARINE MAGIC Working with augmented reality (AR) technology the Sarnoff Research Institute, which first brought us the first-down marker seen on televised football games, is developing technology to allow marines to train for war-like situations with virtual combatants. Under the leadership of Teddy Kumar (pictured) they hope to present their work to the Department of Defense in late April.
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