Segway has begun selling a lawnmower that autonomously cuts grass without human input.Using GPS, a camera, and artificial intelligence, the lawnmower detects the boundaries of the grass, so it doesn’t ride on sidewalks, bodies of water, the ground, or other surfaces.If necessary, the user can change the terrain map in the app, add restricted areas and other vegetation that the lawnmower should avo

This little-known device is called a camera lucida – invented in 1807 specifically for drawing.The principle of operation is in the clever placement of glass (prisms), thanks to which the artist can transfer to paper with maximum accuracy any object, seeing it directly on top of the canvas.