When Alexander Fleming discovered penicillin?, 1932, 1921, 1928, What was Yuri Gagarin famous for?, He wanted to be a teacher. But his dream did not come true., He flew into the space and spend more than hour there, He was American hero., Who was Nikola Tesla?, painter, archaeologist, historian, researcher., inventors, physics, mechanical engineer., How is the Nano-spider different from other microscopic DNA walkers?, The same., The Nano-spider is different from other microscopic DNA walkers as it can manage as many as 50 steps, which is a possible walking distance of around 100 nanometers, I don't know, What does the writer say about arguments against the use of nanotechnology?, There are concerns about whether the industry has strict rules for safety., There are no concerns., People are concerned., How does the size of the Nano-spider compare to the diameter of a human hair?, doesn't say, I don't know, The Nano-spider is amazing 100,000 times smaller than the diameter of a human hair, measuring a mere four nanometers in width., What are the abilities of the Nano-spider as described in the text?, The nano-spider cannot move., The Nano-spider can understand its surrounding environment, make decisions, and move automatically. It can walk, turn left and right, and even create its own products., is doesn't say., All in all, the writer presents nanobots as devices which..., we should be afraid of, are mainly useful in industry, have alredy been in use for many years

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