Answer:

because it was having life before millions of years

Verified answer

• ⇒Hi there! your answer :-

Acoording to world space ageny mars was first suspected to be a dead planet, however in the recent 25 years it shows the availability of water . apart from this the atmosphere also shows the significance of life sustaining gases like the ozone(o3), carbon(c), hydrogen(h2).

⇒Hope it helps you a lot✌