Here's everything you need to know about National Geographic Expeditions to help you decide if this tour company is the right ...

These types of expeditions not only contribute to science but also promote conservation by raising awareness about species like the nautilus, whose population seems to be declining.

Science expeditions to the Arctic, military-history deep-dives along the Mississippi and more. On these cruises, you’ll be rushing for a seat in the lecture hall instead of the on-board casino.

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 ...