Can Man Expand to other Planets ?

神少

As everyone knows , natural environment on the other , planets is very severe and different from that on the earth. Therefore , it is im-possible for man to survive there . Moreover , how to transfer so many people to other planet as the capacity of our spacecraft is limited; Fur-thermore , food and other energy resources should also be taken intoconsideration . In short , as far as our present technology and equipment are con-cerned , it is not likely that man expand to other planets .