To unlock Mercury, players must complete the Venus to Mercury Junction. This Junction requires players to defeat the Jackal at Fossa on Venus, complete 10 waves of Defense at Tessera on Venus, complete Linea on Venus, and defeat 5 eximus foes.
[pdf] • 1941: Isaac Asimov published the science fiction short story "Reason," in which a space station transmits energy collected from the sun to various planets using microwave beams. "Reason" was published in the "Astounding Science Fiction" magazine. • 1968: introduces the concept of a "solar power satellite" system with square miles of solar collectors in high for collection and conversion of sun's energy into a beam to tra.
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