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This week, I've been reading a very entertaining book by Mary Roach called Replacable You.

It's a whistle-stop tour through our attempts to enhance our bodies, usually because a bit of it has failed.

Roach points to a pattern throughout history where, first off, the replacement is a separate thing, like a wig.

Then comes complex ways of attaching that wig,

then comes hair transplants,

and genetic tweaks to stop baldness are currently in the pipeline.

So, separate, integrated, and finally get the body to make its own version.

And these stages for teeth are fascinating.

Starting with the most modern scientific efforts to grow teeth

and work back past implants drilled in, past dentures,

and you get to a device that was new to me.

The Masticator.

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