The Martians were giants with the strength of twenty men. When they attacked Earth, it looked like all was lost. The Martians were just too strong. Fortunately, their immune systems were not strong enough to fight off common earthly bacteria. Edison’s Conquest of Mars is a science fiction story written in 1898 by Garret Putman Serviss. The story starts as the war for Earth ends, and humans chase the aliens back to their home on Mars.
Gaia
Is our planet alive? Some who call our earth “Gaia” seem to think so. After all, something keeps the earth habitable for us. British chemist James Lovelock gave a lot of thought to the idea of “a single giant living system … with the capacity to keep the Earth always at a state most favorable for the life upon it.”