"Imagine the last time something in your house broke--a cup or
plate, a bracket, a door handle, a component in an electrical
appliance or mechanical device, a hinge, a switch. The list can go
on and on. But instead of tossing the entire device out, or heading
to the local hardware or electrical store to find an often costly
replacement, imagine if you could recreate that object or component
in your home on a 3D printer. Now imagine if the 3D printer you use
to make that part could recreate itself as well.
"This idea of self-replication has been around for some time,
but until recently such technology has been far from the reach of
the average person, costing tens of thousands of dollars to
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