Though I've been on many types of cruises, my first expedition cruise with National Geographic was different from other trips ...

One type of journey remains relatively rare -- circumnavigating the globe by human power alone. It just takes so long! But this is exactly what Karlis Bardelis has been doing for the past eight years.

After 15 years of relentless searching and more than 1,000 expeditions, NOAA researchers have achieved an unprecedented feat: spotting a living nautilus in its natural habitat. This discovery is not ...