Could life have ever existed on other planets in our solar system?
Yes but maybe not as evolved or there may have been cases where live existed but not quite as we know it, there are still many unanswered questions about many celestial bodies in our solar system Mars — Life on Mars has been long speculated. Liquid water is widely thought to have existed on Mars in the past, and there may still be liquid water beneath the surface. Methane was found in the atmosphere of Mars. By July 2008, laboratory tests aboard NASA’s Phoenix Mars Lander had identified water in a soil sample. The lander’s robotic arm delivered the sample to an instrument which identifies vapours produced by the heating of samples. Recent photographs from the Mars Global Surveyor show evidence of recent (i.e. within 10 years) flows of a liquid on the Red Planet’s frigid surface. Mercury — the MESSENGER expedition to Mercury has discovered that a large amount of water exists in its exosphere. Europa — Europa may contain liquid water beneath its thick ice layer. It is possible that vents
