For example, decades ago one expert said that by 1984, farmers would plow the ocean floor with underwater tractors; another said that by 1995, cars would be equipped with computerized hardware that would prevent collisions; and another predicted that by 2000, there would be some 50,000 people living and working in space.
पण भविष्याबद्दल मनुष्याच्या मनोकल्पना सहसा भ्रामक असल्याचे सिद्ध झाले आहे.