X-Rays Reveal Internal Opposing Twist in Narwhal Spiral Tusks

Scientific imaging has uncovered a unique internal twisting mechanism in narwhal tusks that helps explain how they grow straight despite their external spiral shape.

28 Aug, 16:50 — 28 Aug, 16:50

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NYTMostly Factual19h ago

Narwhals Have Stunning Spiraled Tusks. That’s Not the Only Twist.

X-rays revealed that the tusks have an internal opposing twist, which may help explain how they grow so straight — the only tusks like them in nature.

By Taylor Mitchell Brown

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X-Rays Reveal Internal Opposing Twist in Narwhal Spiral Tusks

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Narwhals Have Stunning Spiraled Tusks. That’s Not the Only Twist.

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