33.
Humanity has only now begun to leave its bootprints and its treadmarks upon the surfaces of other planetoids (like the Moon), and only recently have the Pioneer probes and the Voyager probes begun to pass beyond the heliosphere, exiting our Solar System, while harbouring messages about our earthly culture on plaques and records, so as to address exocivilizations above us on the Kardashev scale. We have only now begun to broadcast messages, via radio waves, into outer space, deliberately transmitting news of our whereabouts to Messier 13 (via the Arecibo Observatory), then later transferring other kinds of information into the void with abandon, including not only an advert for Doritos™, sent to the star HD 95128 in the constellation of Ursa Major, but also the movie The Day the Earth Stood Still (starring Keanu Reeves), sent to the star Alpha Centauri.52
The Deck of the InSight Lander at Elysium Planitia on Mars
Image by NASA jpl