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Scientists just discovered an unknown species hidden in the world's longest cave - and it's terrifying

Scientists have uncovered a previously unknown species of extinct shark deep within the labyrinth of Mammoth Cave in Kentucky ...

These ‘cryptic’ whales had never been seen alive in the wild before - then scientists found six

Ginkgo-toothed beaked whales have long remained a mystery, but a groundbreaking sighting may soon change that. View on ...