. >> hey guys this episode gets personal, i'm here with doctor crystal dilworth and marita davison, and my epi pen. and i have it for a very important reason which is i'm allergic to peanuts and some other nuts too, but if i get too close to peanuts, one of you would have to grab this, take off the lid, and jab me in the thigh. >> i'm lucky, i don't have any allergies, but phil i know this is something you have to really organize your life around. i mean even here at this coffee shop you have to ask if anything here is cooked with peanuts or peanut oil before you can order off the menu. >> kind of a pain when it comes to ordering in places like this. >> but you know what's surprising and i would say really alarming is that the number of people like you, phil, with food allergies has skyrocketed in the last few decades, and we went to find out why we're seeing a rise in food allergies and if we might find a cure. >> it was terrifying. his face basically swelled up like twice the normal size. >> when you've held your daughter in your arms almost dying because of something as basic as milk

>> 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'

. >> 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 a team of scientists who are using some unexpected weapons- dna and radiocarbon dating- let's check it out. >> april 18th, 2015. thai customs intercepts 4 tons of ivory smuggled in bean sacks from the democratic republic of congo. it is the largest seizure in this country's history. the ivory, on the way to laos, seized in bangkok after a tip. the seizure makes headlines >> thai customs displayed over 3 tons of confiscated african ivory worth 6 million dollar