this is from jeff mackly and his team.an these guys put lots of effort and planning into getting these incredible shots. the angle that they got here of one of their explorers, it seriously looks like he was birthed by that volcano. >> i can't even imagine what it must be like to be there, to see the lava explosions, the fire, the heat, the smell. >> it's fascinating to see these big waves of magma come splashing out of the side of it volcano. you can see right there, the earth is being built. they got these amazing images as this guy right here taking a selfie with the magma in the background. even brought his guitar for a picture as well. here you can see the helicopter transporting all the gear they needed for this expedition. it's fascinating. someday i'm going to see you do this. >> the gears are rolling, trust me. >> i've said 'before, they are like our terrestrial astronauts, exploring some of the world's most spectacular scenery. >>> this is a fishing video, but look who got who. >> ohhh, okay. hooked. >> he was. they are off the coast of california. they had the yellow fin tun