Does Mars have a volcano taller than Everest?

The Claim

Mars has an enormous volcano called Olympus Mons.

The Answer

NASA identifies Olympus Mons as the largest known volcano in the solar system. Its height is commonly given at roughly 16 miles, far above Everest's elevation.

Why This Is Surprising

It sounds like the kind of claim that races around social feeds without context. The source trail matters because the best version of the wonder is the verified one.

How We Checked It

We looked for an authoritative primary source, checked the wording against at least one credible secondary source when available, and recorded the last review date.