Martian (The War of the Worlds) single suction-cup toe, similar to those on their fingers; other art shows two legs. No description of the alien's internal structure is given; but they are revealed to have blood, and their anemic blood cells are viewed by scientists under a microscope. As in other versions of the story, the Martians succumb to terrestrial bacteria. The aliens appear to have no use for human beings, unlike the original book's Martians who also used them as a blood supply. In the Asylum film "H.G. Wells' War of the Worlds", also known as "Invasion", the Martians resemble a short, green, disc-like head
The War of the Worlds 1900 echo scientific ideas of the time, including Pierre-Simon Laplace's nebular hypothesis, Charles Darwin's theory of natural selection, and Gustav Kirchhoff's theory of spectroscopy. These scientific ideas combined to present the possibility that planets are alike in composition and conditions for the development of species, which would likely lead to the emergence of life at a suitable geological age in a planet's development. By the time Wells wrote "The War of the Worlds" there had been three centuries of observation of Mars through telescopes. Galileo in 1610 observed the planet's phases, and in 1666 Giovanni Cassini identified the polar ice