4 ms·
that's really sad :(. 300 light years ... gonna take a while. maybe the filter is space travel - no civilization is able to amass enough energy to go those dist
by catwind7 6y ago
that's really sad :(. 300 light years ... gonna take a while. maybe the filter is space travel - no civilization is able to amass enough energy to go those distances
- macintux 6y agoWe have an enormous, almost inexhaustible source of energy just 1 AU away.