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.
Technology
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. Source: Read the original article on www.nytimes.com
