Editor’s Note: Monthly Ticket is a new CNN Travel series that spotlights some of the most fascinating topics in the travel world. In April, we’re setting course for the diverse world of cruises.

As interest in small-ship expedition cruise travel continues to grow—particularly in polar and warmer weather destinations—AdventureSmith Explorations reports there are new ships, trips and ...

Publicly available data helps monitor ship traffic to avoid disruption of undersea internet cables, identify whale strikes, and study the footprint of underwater noise. As we run, drive, bike, and fly ...