Question

Did you know that Mars’s shield volcano, Olympus Mons, is almost 3 times the height of Mount Everest?

Answer 1

Yeah it is largest extinct volcano in Solar System.NASA propsed to use the central for base for human colonizers

Answer 2

$\tt\pink{Yeah,\:it\:is\:true}$

It is 15 miles high and 403 miles across!