“Nano robot” moves inside the body to deliver medicine to the organs.

Scientists have experimented with operating a mobile robot, designed to pick up and carry objects. It is extremely small and invisible to the naked eye.

The robot was built from DNA, the molecule that carries the “book of life,” or the genetic instructions for all living organisms, according to the British Daily Mail.

In the future, similar nano-robots (extremely small) could be used to assemble new chemical molecules and travel through blood vessels to deliver medications.

Lead author Dr. Lulu Qian from the California Institute of Technology said: “It’s exactly like sending electromechanical robots to distant places such as Mars. Our research team wants to send molecular robots to places so small that no human can reach them, such as the bloodstream.”

The nanobots, described in the journal Science, are made of three basic building blocks that provide “feet” for walking, an “arm” and a “hand grip” to pick up objects, and a trigger to deliver medicine to the targeted point.

Each component was built from just a few subunits of DNA.

Experiments included sending the nano-robot to explore a molecular surface, capture two fluorescent dye molecules (yellow and pink), and deposit them at a specific point.

The microscopic processor successfully sorted six molecules and placed them in their correct locations within 24 hours.

Researchers say that, in principle, DNA robots can be designed with multiple arms and hands so they can carry several molecules at the same time.

Dr. Qian added: “We are not developing DNA robots for any specific applications. Rather, DNA robots are intended for general purposes.”