Interplanetary communication will be possible

Nikola Tesla : physicist, scientist
"One of the great possible achievements of the next hundred years would probably be the confirmation and interpretation of this planetary challenge to us At the present stage of progress, there would be no insurmountable obstacle in constructing a machine capable of conveying a message to Mars, nor would there be any great difficulty in recording signals transmitted to us by the inhabitants of that planet, if they be skilled electricians."

Tesla, N. (1901) TALKING WITH THE PLANETS, Collier's Weekly, February 19, 1901, page 4-5