people are stepping into mercury. i'm philtorres i'm an entomologist i've conducted extensive research in this rain forest so this story is personal. it really pains me to see this. marita davidison is a biologist specilaizing in ecologyand evolution now she shows us the high tech tools that are exposing what even the eye can't see. >> so where it's blood red that's where the mercury polution is most intense. >> we'll share our findings with lindsay moran she's an ex -cia anaylist. that's our team, everything we've been seeing... it's for this... now let's do some science. hey guys welcome to techknow i'm phil torres joined by lindsay moran and marita davidson. this upcoming episode is an important one to me it takes place in peru where i've done alot of my research and it is a tale of contrast we will see a rainforest full of