The most significant change since those 1970's experiments were conducted was the discovery of high levels of perchlorate on Mars. Perchlorate, plus abiotic oxidants, explains the Viking results ...

NASA's Viking missions in the 1970s were groundbreaking, marking the first time humanity sent spacecraft to Mars with the goal of searching for life. Viking 1, launched in 1975, landed on the ...

A total of 20 guests have reviewed Viking Mars, giving it a rating of 4.5 on a scale of 1-5. Relaxing cruise Mar 16th, 2025 We love traveling with Viking. Considering next trip - Barcelona to ...