we are here to talk about rockslide, rockfalls, and related issues. what is the difference between a geologist and a geotechnical engineer? >> and engineering geologist deals with identifying site characteristics, mapping, the ground's surface, collecting all of this data. the engineer can come up with medications and designs. >> the structural engineer might be working on a building if there is a building involved. what is your role? >> i am interested in the physical properties of the earth and how the earth will behave: subject to different load changes. when you are building a building, you are applying a load and you are wondering if the earth will be able to supply that load. we work closely together and we come up with practical engineering solutions. >> this is when someone wants to build something. also, we have a rock piece of land. we have to have a resolution. >> in the u.s., about 2/3 of the population lives in areas that are prone to landslides. about $2 billion of damage occurs annually from landslides. unfortunately, 20-25 million peop

because of this activity it is causing low-level earthquakes which is causing some of the rockfall that you see on the sides. but also the gases that escape from the cracks and holes around this. >> if you stick around when you're filming this, you see this thing, it looks like it will explode any second. you keep filming? i'm glad he did for our sake, but i think i might have high-tailed it out of there. >> this is no simple, ordinary ski run. >> that's a pretty decent-sized hi hill, it looks like. >> see why this one is the very first time next. >> these guys have a for sure way to get a girl's number what do the ladies think? >> once they walk away, get a ♪ i'm your venus [ female announcer ] what does beauty feel like? find out with venus embrace. every five-bladed stroke gives you 360 degrees of smooth for goddess skin you can feel and feel. ♪ i'm your venus only from venus embrace. mcdonald's dollar menu, home of the meaty, melty mcdouble you love... and now love two more tastes, the bold hot n spicy mcchicken, and the irresistible new grilled onion cheddar. each just a dollar. .