When children take up ways of making a living that differ greatly from their parents,differences in outlook can easily arise.This is what Alfred found.Brought up in the family of a building worker,education led him to develop different interests and ambitions from his father.Here he writes about how this affected their relationship.
It has been found that certain bats emit squeaks and by receiving the echoes, they can locate and steer clear of obstacles------or locate flying insects on which they feed. This echo-location in bats is often compared with radar, the principle of which is similar.As the time and cost of making a clip drop to a few days and a few hundred dollars, engineers may soon be free to let their imaginations soar without being penalized by expensive failure.
