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Dr Chris McKnight has been researching how seals can hold their breath as part of his work at the University of St Andrews.

The seals took part of their own free will in the University’s pool facility, diving underwater to get fish. The seals were exposed to air mixes that were altered to affect circulating levels of ...

All steelhead start life as rainbow trout, but not all rainbow trout will become steelhead. Confused? You’re not alone.

Over time, she removed the "conspicuous" cues until she wore plain dive gear, kept the food hidden, and fed fish only after they had followed her the full 50 meters. Of dozens of fish species ...