when enric sala was here in december, his "national geographic" team filmed this.al giants up to 40 feet long, suspended near the surface. their nap lasts only about 15 minutes until the whales are ready to dive again in what can be an hour-long journey for squid thousands of feet down. even to researchers, why they sleep like this is one of the great mysteries. what's it like to be in the water with them? >> magical. we have in our minds the legend of moby dick, these nasty, aggressive animals. but you jump in the water, and they are so docile and gentle. they have never attacked humans. and they are so curious, especially the babies. so it's one of the most amazing wildlife encounters that one can have on the planet. >> your official title is explorer in residence. not bad. >> it's an oxymoron. explorers are not supposed to be sitting in one place. >> that's true. what's that mean to be an explorer in 2023? >> very different than what an explorer of the 19th century was. i can dedicate my life and work with an amazing team of scientists, policy experts, filmmaker