Ask a mechanical engineer to build you a pump that weighs 300 grams, pumps 300 litres of fluid per hour and cycles continuously for 100,000 times every day for 100 years with no service or maintenance, and he’ll tell you it can’t be done.

Tell a computer scientist you want to build a neural network computer containing 86 billion neurons with 500 trillion connections between them that can perform 10 quadrillion calculations per second and manage critical systems on autopilot while actively engaging in complex interactive problem-solving tasks with infinite possible outcomes, can write a symphony and solve equations for multi-dimensional non-linear hyperbolic systems; all while storing and recalling a century of memories and constantly learning, growing and adapting, and she’ll tell you it’s impossible.

Tell an optics professor you want an optical detector made up of 2 million parts that can focus on 50 objects per second, distinguish 10 million colours and detect a candle flame 3 kilometres away, all with a response time of 10 milliseconds, and he’ll tell you you’re dreaming.

Tell an air filtration engineer you want to build a machine containing 300 million tiny sacs that can draw in a gas mixture, extract oxygen molecules from the gas and then transfer that oxygen across a membrane to a fluid that carries it to a location where the oxygen combines with glucose to create energy, which then creates waste gas of carbon dioxide that is then transported back via the fluid, crosses in reverse over the liquid / vapour membrane and is then expelled out of the machine, and they’ll say you’re crazy.

Request a hydraulics engineer to design a fluid transport system in a complex, interconnected, bi-directional tubular web with a length of 100,000 kilometres in a vessel just six feet tall that is in constant motion and they’ll say you’re delusional.

Ask a robotics engineer to design a machine with integrated artificial intelligence that can catch a ball, run a race, lift 6000 pounds, fix a watch, perform brain surgery, and dance a pirouette, and he’ll ask if you’re joking.

Specify to an immunologist that you want an infection control system that can attack viruses, bacteria and parasites and identify and memorize their genetic signature to build up immunity against exposure to millions of germs every day in an integrated process that is constantly evolving and adapting, and they’ll tell you it’s impossible.

Ask a process engineer to develop a closed system that can ingest all manner of organic material from which it creates electrical energy and extracts essential nutrients, then filters out harmful biohazards and expels them from the system, and he’ll tell you it can’t be done.

The human heart, brain, eyes, and lungs and the circulatory, muscoloskeletal, immune and digestive systems are just a few parts of the truly amazing human body.