. >> reporter: ken wharton is a physics professor at san jose state university. >> do you think time travel will be possible? >> absolutely, as long as you're just considering going into -- >> reporter: professor warren says you need to build a near light speed spaceship, travel for about a year or two and you would end up nearly 30 years into the future. >> this has been tested. we have tested clocks in space in spaceships. sure enough, the time on the clock is different than the clocks that stayed here on earth. going into the future is an engineering problem. >> a problem that we probably don't want to solve. think about it. someone from 1985 traveling into the future to 2015 only to remind us what it was like 30 years ago. who would want that? somewhere in time, bob redell, "today in the bay.." >> that means he still has the t-shirt. >> fits him just as slimly as well. >> all that muscle. >> he may want to rethink the cubs prediction. >>> 4:52. coming up, a new store already about to open in san francisco already causing outrage. how a display who live near the famous parrots of

. >> ken wharton is a physics professor at san jose state university. >> do you think time travel is >> absolutely, as long as you're considering going into the future. >> professor says you need to build a near light speed spacesh spaceship, travel around for about a year or two and you'd end up about 30 years into the future. >> this has been tested. we have tested clocks in space and the spaceship. sure enough, when they come back, the time on the clock reading is different from all the clocks that stayed here on earth. >> but the whole light-speed thing. >> going into the future we can do. it's an engineering problem. >> it's an engineering problem that we probably don't want to solve. think about it, someone from 1985 traveling into the future only to remind us what it was like 30 years ago. who'd want that? somewhere in time, bob redell, "today in the bay." >> i feel so old. 30 years ago that movie came out? were you even born, kari? >> of course. >> by the way, the shirt is 30 years old as well, bob's muscle shirt. >>> let's look ahead to the very near future. we'll take a loo

. >> reporter: ken wharton is a physics professor at san jose state university. do you think time travel will be possible? >> absolutely as long as you're just considering going into the future. >> reporter: professor wharton says you need to build a near light speed spaceship. travel around for about a year or two and you would end up about 30 years into the future. >> well, this is been tested. we have tested clocks in space and spaceships and sure enough when they come back the time on the clock reading is different from all the clocks that have stayed here on earth. >> reporter: but the whole light speed thing. >> going into the future we can do, it's just an engineering problem. >> reporter: it is an engineering problem that we probably don't want to solve. think about it someone from 1985 prowling into the future of 2015 only to remind us what it was like 30 years ago. who'd want that? bob redell, nbc bay area news. >> i like the little bobby. >> put him in our pocket. >>> what do you think about your hometown? the memories created there. >> that's one grou