Martian atmosphere

In 1947, infrared analysis revealed that Mars' atmosphere is primarily composed of carbon dioxide with no nitrogen, oxygen, or water vapor. This discovery diminished the hypothesis of advanced life forms on Mars.
 Gerard Peter Kuiper United States 1947 Martian atmosphere

In 1947, infrared analysis revealed that Mars' atmosphere is primarily composed of carbon dioxide with no nitrogen, oxygen, or water vapor. This discovery diminished the hypothesis of advanced life forms on Mars.