4 ms·

Coverage of earth by earth sensing satellites in visible spectrum is so high, that you can literally write different message into sand / earth every hour. No ra

Coverage of earth by earth sensing satellites in visible spectrum is so high, that you can literally write different message into sand / earth every hour. No radio construction necessary XD

junon 4y ago
Someone needs to be looking, though.
- mrslave 4y ago
  And someone less desirable could also be looking.