Until recently, scientists Robots Making Robots? birds lay eggs, adult believed that only living things reproduce selves. For example robot create a second give birth to baby and more plants. can a In 2005, a group or third You'll be surprised to know that such a robot exists today up of four of scientists at Cornell University in Ithaca, New York, succeeded in creating a robot These uce. It can build a copy of itself in less than three is actually made units. Each unit contains a computer which is with building instructions, instructions enable the robots to do many things like sense and move around them. They can also remember sequence in which they were built. At this point, the can do littl but reproduce. the say it won't be diffieult to add more later on, such as a camera or However, researchers special arms. This would allow them to do many different things. Such robots would be very useful in the field of space travel. Scientists already send robots into space to replace humans on difficult dangerous jobs. Now, for instance, they plan to send extra robot- building materials or a robot broke down, for example, other robots could repair on these trips. If They may even be able to build more robots as needed while up in space. Many see these new robots as a sign of the future 91. In the last sentence of paragraph 2, what does them refer to? a. researchers b. cameras functions robots 92. What is the main idea of the last paragraph Space is too dangerous for humans to explore. b. These new robots will aid space travel in the future. c. Robots are already widely used in space travel. Scientists have already decided to use these new robots. 3. What is NOT mentioned in paragraph 2? Robots can sense when something is near. b. Robots can move things around Robots can take photographs. d. Robots know how they were built.