Could Chordate Have Evolved to use any Other Metal? Is it Limited to Alkaline Earth Metals if so?
Basically just the title. Could bones have been made with magnesium, or radium? Even more so, could it be aluminum or iron?
Edit: this is about bones, if that wasn’t clear. I should probably mention that, so I don’t sound like an idiot who doesn’t know we use other metals elsewhere in the body