"The idea naturally presents itself that mirrors might be manufactured which will reflect sunlight in parallel beams. For the time being this is a task beyond human power, but no one can set a limit to the future achievement of man... But there is one method of putting ourselves in touch with other planets... This combination of apparatus is known as my wireless transmitter... It is evident, then, that in my experiments in 1899 and 1900, I have already produced disturbances on Mars incomparably more powerful than could be obtained by any light reflectors, however large. - Nikola Tesla"