Two Planets

Two Planets is a novel by Kurd Lasswitz. Written before the exploration of the North Pole, it tells the story of a group of explorers who find a Martian base. The Martians can only operate in a polar region not because of climatic requirements, but because their spacecraft cannot withstand the rotation of the Earth at other latitudes. Lasswitz's Martians resemble Earth people in every respect except that they have much larger eyes, with which they can express more emotions.