[ cheers and applause ] that was great i wanna thank sheryl crow, andy garcia, ben affleck, robin williams, nicole kidman, gary oldman, amy adams, reese witherspoon, demi moore, sarah silverman, emily blunt, greg kinnear, oprah winfrey, robert de niro, sally fields, john krasinski, jimmys parents. Nightline is next. Is there anything you want to say before we wrap things up . Im sorry, were out of time. Good night, everybody [ cheers and applause ] tonight on nightline, to catch a cheater. They the cheat, but they cannot hide. From facebook to twitter to text. Why hidden Digital Footprints may mean the end of infidelity as we know it. Diving for gold. An underwater Treasure Hunt with the fortune seekers braving alaskas icy waters, trying to strike it rich in a new american gold rush. Hot pants . We try out the latest celebrity fitness craze. We try out the high octane workout gear designed to help you get more bang for your burn. Keep it right h from new york city, this is nightline with cynthia mcfadden. Good evening. Thanks for joining us. Tonight, cheaters beware. The trail of clues that you may not realize youre leaving could be coming back to haunt you, from tweets to emails and facebook messages, the digital age has blown open the door to new and cutting edge ways to catch cheaters red handed, including hidden electronic clues that maybe even the delete button cant destroy. Heres abcs nick watt. Reporter technology, its infidelitys best friend. Texts, tweets. Some say 30 of dating site users are cheaters, and the social networking sites like facebook get a bad rap as marriage breakers, allowing us to rapidly reconnect with that High School Sweetheart or meet a total stranger the minute our marriages hit the doldrums. But theres a flip side. John nazarian, a hardnosed p. I. , joined me in a seedy hotel room to explain whats going on. Privacy doesnt exist no more. Reporter privacy doesnt exist anymore . Its over. Reporter lipstick on a collar is no longer the cheats biggest problem. Nick, technology is going to get you caught at some point. Technology is killing the cheater. Reporter an electronic infidelity trail was near impossible to erase. It was Text Messages that played a role in the down fall of tiger woods. The picture was of me. Reporter congressman Anthony Weiner a laughing stock after sending photos of his manhood to young women on twitter. An email did for cia director, the retired general david photographer, it provided the smoking gun. And you know what . Theyre all only human. We are predisposed to eat meat. Were predisposed to feel when fear when an animal is running towards us. And we are probably predisposed to cheat. Reporter its biological. Its animal. Some people are more susceptible to this than others. But this doesnt excuse them. We are animals that can say no to our heritage. Reporter its a common problem. So common that, of course, theres a tv show about it called cheaters. Youre with my fiance. Reporter where people ask for help catching their allegedly twotiming partners. You know, there was once a remedy for adultery and infidelity, and it was death. I want all your [ bleep ] out of the house. There is absolutely no legal penalty or remedy for adultery now. So we have privately created a penalty. Reporter its getting easier and easier to catch someone cheating because theres a trail of digital bread crumbs. Robert, have you ever considered having an affair . Oh, absolutely. Had been planning one springtime. Reporter rob delaney is a comic and a mouthpiece of humor. I had a neighbor that i was planning on having sex with and i was about the take the first step, but if the head of the cia gets caught, then i have no chance, so im probably not going to do it. Reporter petraeus was the guy who ran two wars. He was the chief spy in the land. She the dumb one of the operation because Paula Broadwell has like 11 masters degrees and three ph. D. S. Shes like a super genius. If the two of them cant get it figured out, what luck do you and i have . And i dont mean you and i having an affair. Reporter these are just some of the deleted texts that las vegas p. I. Ed offerman has recovered from cell phones. We collected over skype. In general, on the internet, people think that theyre invisible. They think they can get away with a lot. Reporter on his website, offerman offers for 69 to scour dating sites for a suspected cheats email address. They realize the trail that theyre leaving behind. Reporter flow another 29. 99 and hell scour Escort Services as well. And then there are always the good Old Fashioned paper phone bills. When we look at phone bills for people cheating, we look at the number of minutes someone is talking. Most cell phone calls are like a minute, two minutes, three minutes max. When you see 30, 40, 50 minute cell phone calls and that number keeps popping up, theres a problem. Reporter he says if you suspect your man is a cheater, he will catch him. Because covering your tracks is now impossible. Is this the end of the affair . Its making it a lot more difficult than it used to be. Cheating used to be fun. I dont think its much fun. Ask the general. Reporter im nick watt for nightline in los angeles. Oh, boy. Beware. Next up, a fortune lying under the saesm our journey to alaska to meet the adventurers risking it all in search of gold. So as you can see, geicos Customer Satisfaction is at 97 . Our journey to alaska to meet the adventurers risking it all in search of gold. Ea our journey to alaska to meet the adventurers risking it all in search of gold. Our journey to alaska to meet the adventurers risking it all in search of gold. Our journey to alaska to m the adventurers risking it all in search of gold. [ male announcer ] something powerful is coming. 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Com watch to catch nightline any time and from anywhere, and go on, set your dvr now, right now, for nightline. Theres nothing in late night like nightline. Nightline. Nightline. Only on nightline. Its a modern day gold rush. Hundreds of thousands of dollars in gold just sitting there free for the taking. Sounds good, right . Well, until you find out that to get it, you have to dive deep into alaskas waters, but a little cold water isnt going to stop these prospectors. Its the underwater gold rush, and it took my coanchor bill weir all the way to gnome. Reporter if you happen to be off the coast of gnome, alaska, and hear the sound of opera, it could be one of two things. Cold and fatigueinduced hallucinations, or emily ridel. She dreams of a life on the stage, but in the meantime, she makes ends meet by riding a tiny hunk of steel and plywood out into the bering sea, changing into a musty wetsuit, and diving to the bottom with a teni think dredging hose. I guess the typical route for the aspiring singer making money while they study is waitress, barista. I would rather dive in freezing water than waitress. Thats how much i hate waitressing. Reporter as much as she hates serving coffee, thats how much shes come to live the sight of a certain precious metal through her cuba mask. Scr. It eclipses reality. You see gold, you forget everything else. You forget that youre in danger. You forget that youre cold or unhappy. Reporter without gold fever, its hard to imagine why anyone would move to this, the corner of frozen and desolate. Aside from a couple rough bars and some surprisingly good pizza, gnome has one thing going for it. Geology. Ages ago, moving glaciers smeared gold deposits here, and you could pick up gold nuggets on the beach. The boom town died. Then came the recent global depression. Prices hit 1,800 an ounce and suddenly building a dredge out of scrap and chasing fle ining didnt seem so crazy. Its hard to overstate just how prim tim this thing is. Weathered plywood, screwed to a basic metal hull. Sputtering engines. Leaky posts. But for emilys boss exboyfriend, zeke, the edge is just the modern equivalent of a pick axe and mule. Fortunes have been made with a lot less. So whats the most excited youve ever been . Whats your biggest strike . When i was working by myself, i had a tenounce day. That was really exciting. But ive spentnr months and mons of summer weather, months and months trying to repeat that. A lot of times, were just getting by. Reporter the roller coaster ride has also turned gnome into a town for reality television. It tracks the physical toll, the emotional role that comes with hunting color under open water and under the ice. Many of the miners go deep into debt to chase the dream, often with bitter results. Time to drink. You wanna go . Reporter for example, Vernon Atkinson plowed hundreds of thousands into his rig last season, but found less than a single ounce, and ended up in a bar brawl with his captain. And then there is the crew of the christine rose, the fatherson team who left a minnesota farm when the gold bug bit, rather than spend all day hosing the bottom, they mounded a backhoe to an 80foot barge and spent 14 hours a day, seven days a week trying to scoop their way to glory. What codo you think that is weightwise . About half an ounce. Thats about a thousand bucks. We mine thousands and thousands of ounce. Getting close to 20,000 ounces since we started. We had a couple three bad years. And that wiped out, you know, 12, 13 years of good mining. Reporter the bathroom facilities may be rustic, but at least they stay relatively dry all day, while over on the edge, emily has learned firsthand how risky their method can be. Pull me up, pull me up i think the most afraid ive ever been i had a couple of experiences this summer that really made me question diving. You can so easily get trapped under water. Something can so easily go wrong. Our air compressor is old and crappy and can shut down at any minute. Reporter so this is a desperate need for cash or is it love of the hunt . That keeps you coming out here . Its both. Im ruined for life getting a real job. [ laughter ] reporter and what do you say to the person watching this whos a gambler that says im going to go do that . I got plywood. I got an old pump. Im going to go do it. By all means, but just accept that its going to be spending a lot of times broke. Reporter thats the title of a good song. A winter in gnome broke. Thats the story. It doesnt last. And they always die broke. Broke, cold and wet. You can see bering sea gold on friday nights on the discovery channel. Just ahead, burn more calories at the gym just by wearing these pants . The hottest new fitness craze. It can be frustrating. T its hard to turn off and go back to sleep. Intermezzo is the first and only prescription sleep aid approved for use as needed in the middle of the night when you cant get back to sleep. Its an effective sleep medicine you dont take before bedtime. Take it in bed only when you need it and have at least four hours left for sleep. Do not take intermezzo if you have had an allergic reaction to drugs containing zolpidem, such as ambien. Allergic reactions such as shortness of breath or swelling of your tongue or throat may occur and may be fatal. Intermezzo should not be taken if you have taken another sleep medicine at bedtime or in the middle of the night or drank alcohol that day. Do not drive or operate machinery until at least 4 hours after taking intermezzo and youre fully awake. Driving, eating, or engaging in other activities while not fully awake without remembering the event the next day have been reported. Abnormal behaviors may include aggressiveness, agitation, hallucinations, or confusion. Alcohol or taking other medicines that make you sleepy may increase these risks. In depressed patients, worsening of depression, including risk of suicide, may occur. Intermezzo, like most sleep medicines, has some risk of dependency. Common side effects are headache, nausea, and fatigue. So if you suffer from middleofthenight insomnia, ask your doctor about intermezzo and return to sleep again. [ male announcer ] start with a groundbreaking car. Good. Then invent an entirely new way to buy one. No. No. No. Yes a website that works like a wedding registry. But for a car. First, you customize it. Then let people sponsor the cars parts as gifts. Dad sponsors the engine for your birthday. Grandma sponsors the rims for graduation. The car gets funded. Then you pick up your new dodge dart at the dealership. And all thats left to do is say thanks. Easy. For those of you still keeping your new years weight loss resolutions, hows this for a hot fitness trend . Workout wear that promises to help you burn more calories at the gym without logging more time on the treadmill. Some celebrities swear by them. Women are lining up for them. And abcs juju chang checked them out. Reporter the latest fashion statement involves sweats that literally make you sweat. Think of it as workout wear that makes you look and feel hot. Hot celebrities like Kristen Cavallari and Denise Richards are sporting them. It feels like a scuba fabric. It does contain a prelayer, and on the inside, we have a yellow lining, which is where the magic happens, if you like. This is what contains the heating layer. Reporter its called zegora hot pants and it promises to help you burn more energy while you work out and look fashionable at the same time. So you actually burn more calories just by wearing the clothes . The body burns more clothes when you get hotter. Reporter its the brain child of debbie bell. I was going to the gym, i was going to yoga, i was doing ten things at the same time. I thought im not the only woman thats short on time. Reporter eventually she designed and developed a line of workout clothes, quit her job as a blogger and gave her hot pants to the work of 500 bloggers. She sold more than a half million items at less than a year and a half, at 70 to 150 a pop. Not nearly as cheap as donning a plastic trash bag, which may yield similar results. Sales also spiked. Real women posting real reviews on the facebook page, which now has more than 350,000 fans. Our biggest market is moms. And moms are great. Because once mom is behind an idea, they tell all of their friends. Reporter so the hot pants are selling like hot cakes. Absolutely. And theyre really making women hot, which is the main thing. Reporter but the women are saying they love it because it holds in their fat as theyre working out basically. We spent 12 months developing that, really making sure that the fit is right, they look great in it. The curves in the hot pants make sure they hold you in all the right places. Reporter workout wear with hidden support built in. The queen bee of shape wear recently showed me her line based on that concept. This is like a tummy tamer hidden in the global warmingen. Reporter and brands like lulu lemon are capitalizing on the 30 billion a year explosion in active wear. Turns out women are willing to spend a lot of bucks on a pair of yoga pants. Zaggora funded Clinical Research at the university of southern california. One study found that wearing hot pants while work out can help you work out. We use a special mask while people are exercising to measure their oxygen intake, which is an approximation for energy expenditure, and its a very precise measure. Reporter both studies showed that they also helped burn more calories, but you still have to do the work. The skeptic in me would say how much more can you really burn . We found that wearing hot pants helps you burn 11 more calories while youre exercising, but importantly, in the hour after exercising, it will help you burn 13 more calories. Reporter so it helps you burn calories even after you stop working out