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Those bones are pretty strong too They are mostly made up of the same minerals that keep your teeth strong and a tigers claw sharp: calcium  - Information from askdruniverse.wsu.edu

They are mostly made up of the same minerals that keep your teeth strong and a tigers claw sharp: calcium phosphate They also contain some  - Information from askdruniverse.wsu.edu

Those bones are pretty strong too They are mostly made up of the same minerals that keep your teeth strong and a tigers claw sharp:  - Information from askdruniverse.wsu.edu

It can be hard to tell twins apart but a close look at their fingertips can reveal whos who The reason lies partly in their genes but mostly  - Information from askdruniverse.wsu.edu