Asklemmy

Humpback whales are able to navigate exceptionally well and I don't think science knows how.

Humpback whales travel by picking a direction and traveling in that direction. They can maintain a true course to within a degree of accuracy for hundreds of miles regardless of location on the planet, ocean currents, magnetic variation, day or night, though open empty ocean.

I know how to do that, but I need stuff the whales don't have like visual reference to a solid surface, accurate charts, radio-based navaids, winds aloft forecasts, and/or gyroscopic instruments. Most of the time, most creatures either navigate by landmarks, some are able to navigate magnetically, some can home, ie they can sense a destination and point their noses at it and go that way, as forces such as winds, ocean currents, Coriolis force etc. push them off course they steer to keep the destination dead ahead, tracing a half-teardrop course.

But humpbacks can pick a direction and go perfectly straight. Somehow.