Question

why did people once think martin's live on Mars ?​

Answer 1

Answer:

Astronomers peering at Mars in the 17th, 18th, and 19th centuries saw signs of life everywhere. Seas! Continents! Canals that carried water to Martian farms! But modern telescopes, probes, and NASA landers ruined the fun by revealing our planetary neighbor's dry details: It's just a lifeless ball of red rock. Early astronomers had confused Mars's ancient seas and riverbeds for signs of civilization.

Answer 2

Explanation:

In contrast, phosphate, one of the chemical nutrients thought to be essential for life, is readily available on Mars.