techknow's marita davison has spent a week here in new orleans - now marita, you've been piecing together what went wrong from a science and engineering perspective. >> and phil you said it, this community was devastated when hurricane katrina hit, now in the 10 years since, scientists have made significant improvements to the system, these are coming together to form multiple lines of defense that reduce the risks from another katrina-like storm. let's take a look. >> this area has been vulnerable to storms like katrina since 1200 years ago. >> katrina was really a wake up call to the corp of engineers. >> what katrina did is... it brought the eye to what's happening when you destroy things...if we don't repair things that protect us, in 80 years the city of new orleans will be under water. >> a decade later, hurricane katrina is still considered one of this country's most deadly storms. in august 2005, katrina claimed more than eighteen hundred lives along the gulf coast--leaving 80 percent of new orleans under water. when katrina hit new orleans she was only a category 3 storm. but in

marita, costa and i see if the devices work. that's the team.et's do some science. [ ♪ music ] >>> hi, guys i'm phil torres, and welcome to "techknow". i'm with costa and marita davison. instead of science, let's talk football. now, i'm a broncos fan. when i saw what the 49ers did with their new stadium, i'll feel bad every time the broncos beat the niners. >> if their game is half as good trouble. >> when you think n.f.l., small does not come to mind. it's full of big excitement and business. don't think of it in terms of being a big player. the stadium may be poised to change that. i got to check out environmental advances. >> reporter: it's game day at levi stadium, home of the san francisco 49ers, at first glance the scene in the parking lot it classical football - tailgating, team revalry. san francisco football is changing the playbook. >> we pushed architects and engineers to think about everything that could be green. >> reporter: in trying to win the green game. this is the n.f.l.'s new arena, and the team behind says it has series gree

>> marita davison is an environmental biologist. >> they're gonna be around the corner. they went through there really quick but we got 'em. >> she's off the coast of california where drones are taking some incredible images of migrating whales. >> as this technology becomes available to more people, we're gonna see more researchers using it. >> i'm phil torres, i'm an entomologist. that's our team, now let's do some science. >> hey guys welcome to techknow i'm phil torres, joined by marita davison and dr. crystal dilworth. now bigger and potentially more dangerous, that's the best way to describe what's happening the smoking alternative known as e-cigarettes, or vaping. >> it's an industry that seems to really be exploding i mean you're seeing it everywhere. and a part of me wonders if this might be because of some misinformation about vaping, that's my sense. >> and our dr. crystal dilworth, you have your phd in nicotine studies so we've asked you to keep a tab on this. there's a lot academic research that's being done on the safety of use of these devices, but it can'

crystal dilworth and marita davison. so guys, picture this, you are deep in the rain forests of peru when suddenly a flock of red and blue magnificent creatures takes off in front of you. they are beautiful, but let me tell you, they don't start out so pretty. >> you have to be talking about macaws. i'm a bird biologist so in my day i've seen a lot of baby birds and i have to admit they are bald and can be pretty ugly but i mean its almost so ugly that they're cute. >> macaws are so associated with the rain forrest its almost like their mascot, but they're not so ubiquitous anymore, they're an endangered species and they're at risk because of habitat loss. >> absolutely, because when the habitat is in trouble, these birds are in trouble. we join a team of scientists down there, who are working hard to make sure that doesn't happen. let's take a look. >> dazzling... elusive... charismatic - macaws are undeniable stars of the rainforest. and there's a special place in peru where it's still possible to see macaws in all the

. >> marita davidson is an environmental biologist >> i am holding a tray of elephant poop. >> she'll show us the high tech plan to stop the killing. >> wow >> then, sea lion's stranded along the california freeway. yes, freeway... >> dr shini somara is a mechanical e engineer, she'll show us what's been done to to find out why this is happening. >> at this stage, are they feeling distressed? and i'm phil torez, i'm an entomologist. that's our team, now lets do some science. >> welcome to techknow im phil torres joined by marita davison and dr. shini somara. guys there are outlaws out there working in the shadows committing horrible acts against defenseless yet majestic animals. we're talking about the ivory poachers who have decimated the populations in africa. >> it's really alarming because ivory goes for about a thousand dollars a pound, that's more valuable than illegal drugs. >> and you know what that means is that the damage has been devestating over a hundred thousand elephants have been killed in just the last three years and the question is what can we do about it? we found

marita davison from "techknow" is here. >> when mr. go was built, many were saying mr. go must go. the mississippi river gulf outlet once duplicated the surge superhighway, a 76 mile artificial channel built for commercial shipping. john lopez is a member of the mr. go must go coalition. also a consultant for the army corps of engineers. >> it was based on some sort of cost-benefit they projected by increased use of navigation on the channel. that might seem kind of ironic because it's built right adjacent to the mississippi river. it showed some advantage but in reality it didn't pan out. the use of the panel is very small. >> because mr. go cut through precious wetlands that acted as a buffer, there was immediate concern. >> locals very heroically trying to fight to get this thing changed. >> we are at the part of the mr. go channel that's called the funnel. at katrina, a lot of water rushed into the gulf, concentrated here and pushed into new orleans and surrounding communities. in 2009, eight different scientists linked mr. go into the most violent flooding in st. johns parish

"un nuevo dÍa" ♪ >>> maÑana de "un nuevo dÍa" yo tratando de conocer trarme con marita za rodrÍguez que. >>> una actitud positiva que inspira a los propios protagonistas de este momento. >>> Él es un joven muy especial, ha al que honramos hoy y cuya historia compartimos con charlestÓn y nueva york y el mundo >>> con chris y yankees ellos cambian una vida mÁs >>> para nosotros los atletas es algo que nos gusta hacer, nos gusta venir a la comunidad y darle y poner sonrisa en cada situaciÓn que podemos >>> tremendo jonrÓn para "un nuevo dÍa" verÓnica albornoz. (aplausos) >>> tremendo jonrÓn veronica increible esta historia y es el sÉptimo aÑo que lo yankees hacen la celebraciÓn anual de (nombre en inglÉs) que estÁ llena de sorpresas y personas especiales para chris con todo lo mejor y siempre rashel que en este momento estÁ siempre que baila y ahora que se juega con invitados de lujos >>> lista mi querido camil porque jugaremos con sopa de letras, el participante debe escribir la mayor cantidad de respuestas en esta pizarra en 40 segundos, le hago una pregunta y la respuesta tiene que puso