Shark may avoid cold blood by holding its breath on deep dives

Scalloped hammerhead sharks stay warm as they descend into cold, deep water off the coast of Hawaii, suggesting the cold-blooded species may maintain its body temperature on dives by holding its breath, according to new research ...

Overfishing risks ocean deserts as stocks plummet

With bigger boats, deeper nets and better sonar than ever before, the fishing industry's response to our insatiable appetite for fish risks transforming much of the world's oceans into aquatic desert.

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