[citation needed]
I was very careful to phrase that with 'selected for' because of course things absorb radiation. That's how bones are visible in X-ray radiology. But that doesn't mean it is something they evolved specifically to do.
[citation needed]
I was very careful to phrase that with 'selected for' because of course things absorb radiation. That's how bones are visible in X-ray radiology. But that doesn't mean it is something they evolved specifically to do.