Nanotechnology . allows microscopic particles to inject medicine directly into cancer cells
allows doctors to take high quality digital pictures inside the body
focuses on the use of robots to perform surgical procedures
will eliminate the need for doctors

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the