and stable detector and kepler is able to see extraordinarily small changes in brightness. enough that you can see the periodic signal of an earth periodically eclipsing the light from its parent stock. what kepler has done we will have a better idea how many earths there are out there and what the pattern of planetary architecture really is. not subject to the observational bias that the radial velocity surge --search for walls, lebron restored big planets. the bias toward big planets. another seeks to understand how those architecture is came to be. the demographics of the planetary system will be determined by ground-based telescopes in missions like kepler but understanding how they came to be requires a combination of theoretical studies, modeling of the processes that give rise to a solar system and observations to confront those models and modify the series. what we think happens is based on what we know today that stars form out o dust, largely hydrogen and helium but crucially the elements as well that make up our bodies. the dust you are supposed to think if you w

the owners of kepler's book in menlo park are urging people not to sign the amazon petition. >> thatantage of not collecting sales tax gives them something in the range of a 10% advantage in terms of pricing. kepler's in silicon valley felt amazon's impact in the '90s when they -- from day one. >> the additional sales tax revenue from the new law is expected to generate $200 million a year fo california. >>> higher prices is the trend for back-to-school shopping. experts say stores are trying to pass on the cost to consumers by using less fabric and calling it the new look or cheap stitching and saying it's a redesign. retailers are raising prices on merchandise an average of 10% to offset rising costs. some analysts call it consumer trickery. >>> just months after a devastating tsunami another scare in japan. >> plus the historic find a northern california woman made in her storage locker. >> a new way to fight terrorism. how tsa agents are using their voice now as a weapon. we'll explain coming up. ,, ,,,,,,,,,,,,,,,, showing no sign of stepping down... despite worldwide calls for

clark kepler is taking aim at amazon, which is now fighting a new state law that requires online companiescharging sales tax for merchandise sent to california. >> that advantage gives them something of a 10% advantage right ow of the gate in terms of pricing. testimony millers in silicon valley felt amazon's impact in the 9 nineties from day one. >> reporter: they lost so much business to amazon he almost shut down 6 years ago until the community saved him. he and other small business owners say amazon is circulating a petition to get a ballot that, if passed, will exempt online sales from taxes. >> i welcome the competition that online gives our business, it keeps me honest, keeps me working at a better level. the problem is we're not on a level playing field. >> reporter: jeff selzer at palo alto will look at his product, ask for advice and buy online to save the taxes. that hurts the brick and mortars who are required to collect sales tax. >> if they are exempt i would like to be exempt. >> reporter: they are not asking you to boycott it, just don't sign the petition for a sales tax ex