Research roundup: 6 cool science stories we almost missed

A science roundup covers three surprising studies: dolphin swimming physics, Roman shipwreck repair clues, and mushrooms that can detect human urine.

University of Osaka researchers used supercomputer simulations to show how dolphins generate vortices that help power efficient underwater propulsion.

Chemical traces and pollen evidence suggest repairs were made to a Roman Republic-era shipwreck, shedding light on ancient maritime technology.

Separate findings report that mushrooms can detect human urine, hinting at unusual biological sensing with possible ecological relevance.