this is "nightline." >> tonight, i-smoke? >> kids are smoking under their shirt, going to the bathroom, smoking it in stalls. >> the first time, i couldn't stop coughing. then after i got the hang of it, i didn't want to stop. >> silent, smokeless, and easy to hide. are new e-cigarettes luring teenagers with techie designs and fruity flavors? >> they only think they're smoking the flavor and it doesn't have any other toxic compounds or nicotine. >> made popular by social media, parents, public officials and kids uniting to extinguish this trend. flat earth? >> i'm a little in the closet. >> they're letting their flat flag fly. >> my senses tell met earth is flat and stationary. >> happening at the flat earth

international conference where skeptics gather from across the globe. >> it's not a globe. >> people claiming the earth is flat and what they want you do know. >> we're not crazy! >> first here are the "nightline 5." >> only tylenol rapid release gels have laser-drilled holes for fast pain relief. tylenol. ♪ when you have nausea heartburn indigestion upset stomach diarrhea ♪ girl pepto ultra coating will treat your stomach right. try new pepto with ultra coating. >>

good evening. summer is here, kids out of school, playing sports, riding bikes, swimming -- but could they also be inhaling nicotine? these days you might not be able to tell. the new popular form of nicotine comes in a tiny electronic vaporizer the size and look after a hard drive or cell phone accessory. my "nightline" coanchor juju chang has more on this addictive and growing trend. >> reporter: it's the modern take on smoking behind the bleachers. >> there's a parenting alert about the danger of teens vaping -- >> the fda warning liquid nicotine used in e-cigarettes -- >> reporter: jewelling, named after this brand of vape pen, exploding in popularity among teens. >> kids are going to the bathroom, smoking it in stalls. >> next thing you know, lat you can't stop. >> reporter: school districts cracking down. parents up in arms. and kids, some unwittingly

becoming addicted to nicotine before they even graduate from middle school. >> they're handed this product. they don't know what it is, they don't know it's nicotine, they don't know it's bad for you. >> reporter: the jewel heats up liquid nick seen that users inhale, made for adult smokers looking to quit cigarettes. >> i'm constantly encouraging people to use this. and not smoke. >> reporter: they feature flavors like cool mint and fruit medley. its capsules or pods, which some kids tell us they go through in a day, contain roughly the same amount of nicotine as a pack of cigarettes. its packaging more like a silicon valley must have than a smoking product. >> you have a techie device, it looks really cool, it's slim. you can hold it in the palm of your hand. your teacher, your parent, has no idea what's going on. you can get it in cool flavors. >> reporter: those flavors, part what was freshman marguerite ferrera says enticed her. >> i've never been exposed to

tobacco, why would i try it? since i was exposed to fruit, mango, mint, i just thought it was okay. >> reporter: she says she's been jewelling about a year. and she started in eighth grade. >> the first time i used a jewel, i couldn't stop coughing. i didn't really like it. then after i got the hang of it and i was able to get head rushes, i was just -- like i just didn't want to stop using it. it's just a part of my life now. i know it's bad but i can't stop. >> reporter: marguerite sharing her struggles alongside her high school classmates in this viral video. >> all the people in my grade started using it. >> when i'm doing my homework, i'll be writing and all of a sudden i'll want a jewel rip. i'll have my pencil in my right hand, my jewel in my left. >> reporter: the project brain child of senior janet jackson waxman who grew more concerned watching his friends with nicotine addiction. >> the problem was getting worse and worse in my school. i wanted to create a video as a cautionary tale to sixth graders who are thinking of starting

jewel. >> reporter: kids say a jewel is easy to conceal, e-cigarette vapor more easy to conceal compared to smoking. >> with a jewel kids see it as something that is kind of just like their iphone. they have their jewel and their iphone. >> at schoolkids will leave class to go to the bathroom. at any point of the day there will be someone in the bathroom either the girls or boys, there will be someone with a jewel. or any type of e-cigarette. >> reporter: a month after that video went live, jack's about to take his advocacy work up a notch. off to meet with legislators to try to raise the age to buy any kind of nicotine in his county to 21. and lobby against those vape vae flavors. >> do you ever wonder if you banned the flavors here, that it would just pop up elsewhere? >> i think if we ban the flavors in westchester, i think the

would set a great precedent in new york, maybe other counties would follow suit. i think the possibility to have a great ripple effect, for westchester to take the lead and be the first step in a long line of uniqyouth prevention. >> reporter: the em-cigarette industry has surged in popularity with jewel leading the back, increasing revenue by 700% last year. with it a swell of online fandom, jokes, memes, and tricks post the by users, not the company, dedicated to jewel culture. hash tags like do it for jewel adding to the cool factor some say is drawing kids to use. >> this little flash drive, feel it in your hands. it feels like really, really slick. >> reporter: jack's literally showing these lawmakers what they're dealing with, asking them to crackdown. >> i'm promoting regulating the flavors for across the entire population. this is a list of where cities and counties have regulated

flavored tobacco products to the entire population. >> reporter: the 2009 tobacco control act banned flavors in regular cigarettes across the country. jack now wants to ban e-cigarette flavors as well. jewel says, our flavors are in no way intentioned for underage use, noting that our data show that flavors play a critical role in helping adult smokers permanently switch from cigarettes to jewel, adding all of our adult flavors are tested to adult panels only and we specifically avoid excessively sweet flavors like cotton candy or gummy bear. >> of course you can't put up barriers on usage, but i think -- do you think you can put up barriers on the sale? >> the legal department has to take a deeper dive into this. >> reporter: in one study, 63% of jewelers ages 15 to 24 say they didn't even know the product always contains nicotine. another recent study suggests that e-cigarettes are a gateway to traditional cigarettes, with

roughly 3 million adolescents now using e-cigarettes exposed to that risk. >> these three flavors have no place in our society. they exist because of a looph e loophole. >> reporter: jewel says their product is designed specifically for adults looking to quit smoking and they're investing $30 million to independent research, youth, and parent education and prevention, te telling abc news, we cannot be more emphatic on this point, no young person or nonnicotine user should ever try jewel. and the research supports it. for adult smokers, switching to e-cigarettes could be a safer option. one study noting, they don't have the lethal mix of carbon monoxide and 70 known cancer-causing chemicals found in cigarettes. >> i think if jewel's intention, which is a good one, is to help adult smokers stop using more deadly products, unfortunately, that's not exactly what's happening here.

>> reporter: while the long-term impacts of nicotine are still being studied, some experts warn the potential harm on a developing brain can't be overlooked. >> and nicotine is very, very dangerous for adolescent brains. >> reporter: dr. taskaran is a child psychologist. >> by exposing them to nicotine chronically, you irreversibly damage the reward systems in the brain. >> reporter: he says nicotine use in adolescents can use reduced attention span, diminished cognition, enhanced impulsivity. the fda has been criticized for delaying e-cigarette regulation. but the agency now beginning to look into the youth appeal of several companies, including jewel. what about the skepticism that this is like a game of whack a mole? you could stop it here but it's going to pop up elsewhere, people will buy it online. >> it comes down to more regulation in the form of legislation, more prevention in the form of youth talks, more

engagement with parents. i think the legislation is just a part of a much larger movement and much larger goal. >> reporter: weeks after that initial meeting, a step towards that goal. westchester county raising the legal age to buy tobacco and nicotine from 18 to 21. for jack, a victory. he hopes the first of many. for "nightline," i'm juju chang in scarsdale, new york. next here, why these believers in a flat earth say the shape of our world is not settled science. you go together, so stay together. ♪ stay together with a $0 copay, you've got zero reasons to leave, and every reason to stay. lantus is used to control high blood sugar in people with diabetes. do not use lantus to treat diabetic ketoacidosis, during episodes of low blood sugar, or if you're allergic to insulin. get medical help right away if you have a serious allergic reaction such as body rash or trouble breathing. don't reuse needles

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who really believe that the effort is flat that all the pictures of our planet from space, all the globes we've been season in science class, are lies. since we first brought you this report, it has become one of our most-watched stories online, with millions of views. so here's abc's eva pilgrim with another look. >> we'll start with some basic questions. the sky is? >> reporter: in a world where it feels like nothing is as it seems -- >> blue. >> it's blue. of course. >> the sky's blue. >> the sky is blue. >> 1 plus 1 is? >> 2. >> 2. >> 2. >> reporter: there's at least one truth we thought was indisputable. >> and the earth is? >> flat. >> flat. >> the earth is flat. >> my reality, my senses tell me that the earth is flat and stationary. >> reporter: or so i thought. but for the people attending the first flat earth international conference here in kerry, north carolina, their earth is indisputably not round.

>> yeah, everybody here can agree on absolutely one thing, which is, it is not a globe. >> reporter: for centuries a flat earth was accepted as certainty. until science and sailboats said otherwise. >> one of the rules of power is you never admit there's someone bigger than yourself. >> reporter: in 2015, this guy, mark sergeant, posted his flat earth clues. >> part of a series of clues that can help you get your head around both design of the flat earth system we live in -- >> you're kind of the father of this movement -- >> oh, boy, don't do that. >> the one who started it all. >> i did not invent flat earth. alldy is walk up to a door, point at it, say, you know what? i think there's really interesting things on the other side of this and check it out for yourself. if flat earth is a university, fea, then i would be the freshman recruiter. >> reporter: people have traveled from around -- mark would say across the flat

world -- to its head. >> the first rule of flat club is you don't talk about flat club. >> reporter: until now. >> i have a poem about that. it's right here. >> reporter: amy nicholson wrote a book of poetry about her flat earth journey. >> a few months flat and seven months to rally -- >> reporter: kim gurley came to the conference from houston. >> i haven't really come out all the way yet. i'm still a little in the closet. >> reporter: laney and voli came from even further. >> i mix with quite a lot of flat earthers in new zealand. >> you know flat earthers, i guarantee it. you don't know who they are because they're afraid of talking about it. >> one, two, three -- we're not crazy! >> reporter: like many modern movements this has grown in large part out of the internet. with rappers like odd tv evangelicalizing to hundreds of thousands of subscribers. ♪ no more living on a cartoon ball ♪

>> reporter: news charges encouraging skepticism about what you've been taught. for the se serious students at conference -- >> this has got to the point it's becoming rigged. >> reporter: it comes down to proof. >> when it comes to science, there are things you can test. father burns, water's wet, drop something, that appears to be gravity. things you can test. >> reporter: the sloping sea level, the spin of the earth, unless you can see these phenomena with your own eyes, they may not be true. a lot of people are going -- >> this is crazy, right? but think about this, for the last 20, 25 generations, this is what we've told people. >> reporter: unlike what we've been told in school, some flat earthers imagine the earth looks like a snow globe. round but not sphere. the north pole at the center of most flat earth maps with the ice of antarctica holding everything in. are you certain this is what the earth looks like? >> pretty sure. almost. i mean, there are some details to be worked out, sure.

but the basic concept is sound. absolutely sound. one thing we absolutely know for a fact, this ain't is. >> reporter: those iconic blue marble images seen from space, flat earthers denounce them as fakes. >> you start seeing words like composite. animation. something that tells you this is not an actual photograph of the earth. >> reporter: so if you think you have questions -- >> feel free to line up and ask them while i'm reading the opening statement. >> reporter: the flat earthers have many, many more. >> this is what returns to earth. >> reporter: which is why i thought someone who's seen the earth from space might have some answers. >> 1 plus 1 is? >> 2. >> what color is the sky? >> blue. >> and the earth is? >> round. just like it is here. this model of it. >> reporter: professor mike massimino spent over 20 days in space and worked on the hubble telesco telescope.

when you looked at the planet, what did it look like? >> looks round, folks. it is round. my eyewitness account. and i looked at it as much as i could. it is round. >> okay, we're in the final countdown. how you doing over there? >> reporter: he's played himself on "the big bang theory." some flat earthers actually believe astronauts are just actors, part of a huge conspiracy going back to those first steps on the moon. >> it's one step for man, one giant leap for mankind. >> you don't believe they've gone to space? >> no, not at all. the rockets go up, there's nobody in them. >> i'm ready to speak fast -- >> reporter: rob is another cely flat earth movement taking clues from the bible's book of genesis. >> there's no way you can get a spinning helio centric globe out of anything in the bible. >> are you skeptical of everything? >> i've become skeptical of everything, rightfully so.

>> pretty much earn here is kind of a conspiracy theorist. >> that's a common trait but there's a little bit of conspiracy theorist in all of us. >> reporter: that's why many of them do their own experiments. darrell packed a level on a flight to test if the plane was flying parallel to a flat earth. there's going to be science people who say, that is a real bogus experiment. >> they have. >> that's a little basic. >> i know. it's so simple, it will go right over your head. >> reporter: the credo for many of these believers, check it out for yourself. >> go out and test. >> you just want them to ask the questions? >> why do you believe what you believe? and let you go from there. because i could tell you something, then you'll look at me and say i'm crazy. >> a lot of people watching are going, that man is crazy. >> i'm sure they probably do. i would say they're crazy for not testing what they think they believe. >> reporter: in a world of disagreements large and small, for something as clear as this

horizon, the interpretation could be infinite. for "nightline," i'm eva pilgrim in kerry, north carolina. next here, inside a little-known and fast-paced tradition when the supreme court hands down a major decision. it's called, the running of the interns. i woke up in memphis and told... (harmonica interrupts) ...and told people about geico... (harmonica interrupts) how they could save 15% or more by... (harmonica interrupts) ...by just calling or going online to geico.com. (harmonica interrupts) (sighs and chuckles) sorry, are you gonna... (harmonica interrupts) everytime. geico. 15 minutes could save you 15% or more on car insurance. [stomach gurgles] ♪when you have nausea, heartburn,

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finally tonight, the ruling was close but the race was a blowout. >> well, it's a big decision. and a victory for president trump. >> the supreme court upholding the third incarnation of the president's travel ban today in a 5-4 decision. restricting travel from venezuela, syria, sib yeah, somalia, yemen, iran, and and north korea. speeding down the steps of the supreme court to pass the ruling to our terry moran, check out abc news intern elizabeth kizer, the running of the intern

that began in restrictions of recording devices inside the supreme court building. now whiz kids like elizabeth deliver important rulings to the reporters outside, with the speed and accuracy you've come to expect from abc news. congratulations, elizabeth, on not pulling a hammy. thank you for your hard work. and thank you for watching "nightline" tonight, have a great night.