Research shows that exercise can help to maintain physicalfunction late in life and that exercising one's brain can limit the progression of senescence.
We have spent far less on our physicaland natural infrastructures than will be necessary for either to function in a way that is optimal for our present and future existence.
Already, 3D printing has been refined to the point where digital models can be duplicated into physical prototypes or production parts that closely resemble mass-produced products in looks andfunction.