david valentine with uc santa barbara, thank you for sharing your expertise. prof. you for having me. ♪ judy: everyone would agree this past year has been tragic in so many ways. it's also been strange. but something is about to happen to make it even stranger. the bugs are coming. billions of bugs. the periodic cicada invasion is just days away in many states. we are so pleased that that one of our own, john yang has gone and learned what you need to know to cope with the coming brood. jo: let's see if we can find someone under your. the bug guy and i are hunting cicada and his neighbors backyard in columbia, maryland. >> look at that. yeah. john: specifically, all of us are fully vaccinated, along with the three-year-old granddaughter emily looking for brood 10 cicadas. what do you think? >> pretty good. john: we dug up the cicadas and then put them back but soon we will not have to look very hard for them. they will climb out of the ground after 17 years below the surface and there will be a lot of them. >> 12, 13, 14 holes. that is probably going to translate in

david valentine with u.c. barbara, thanks so much for sharing your expertise with us. >> thank you for having me, stephanie. >> woodruff: if you think the last year has been not only tragic, but in many ways, weird, wait-- the bugs are coming. billions of bugs. the periodic cicada invasion is days away in many states. but have no fear. john yang lays out what you need to know to cope with the coming brood. >> okay, so let's see if we can find somebody under here. >> yang: entomologist mike raupp, a.k.a. “the bug guy” and i are hunting cicada in his neighbor's backyard in columbia maryland. >> boy, there we go, look at that. oh, yeah. >> yang: raupp, his neighbor tim hughes, and i, all of us fully- vaccinated, along with hughes's three-year-old granddaughter, emily, were looking for brood ten cicadas. what do you a think? >> pretty go? >> yang: good? >> he's pretty cute isn't he? >> yang: we dug up the cicadas and then put them back. but soon we won't have to look very hard for them. they'll climb out from hole

>> reporter: it's hard to believe but for at least 30 years, doctor david valentine says the scientificumblings about but frankly did nothing about reports of this massive chemical dumping ground about 10 miles off the coast of la. from 2011 to 2013, valentine and his crew on their own went looking in the deep water between long beach and catalina island. these are some of the images captured by a camera attached to an autonomous vehicle they sent to the ocean floor 3000 feet down. >> it's at first a shock, it's a gut punch and now we are talking about hundreds of thousands of barrels of industrial waste and much of it toxic. it was just dumped there because it was easy. >> reporter: since then his team has been putting together the pieces of how it got there, suspecting the second dumpsite of montrose chemical corps, once the country's largest manufacturer of ddt. a legal battle found the company dumped millions of pounds of pesticide intercounty sewers from the 40s until the 70s. last year valentine published his new findings, stunning residents and state leaders and offering clues th

david valentine, a university of california marine biologist, spent ten years looking into the company'shem into the storm drains. they dumped them into the sanitary sewer. >> reporter: in response, a 34 square-mile area just offshore was designated as a superfund cleanup site. montrose was sued, and almost half of the $140 million settlement was used by noaa to try to restore at least some of the contaminated habitat. >> one of the goals of the restoration funds and work is to enhance fisheries. >> reporter: so the government tasked jonathan williams, a marine biologist from oxidental college, to design a seven-acre artificial reef just off the beach. so by providing healthier habitat right here, that means that it's less likely ddt is entering the food chain? >> that's correct. if you have healthier habitat, you're going to have healthier fish. >> reporter: for several decades, scientists and regulators were focused on the hazardous toxic superfund site just about two miles off shore. while all the while an even more shocking discovery was waiting to be unearthed about ten miles off sh