[Jagermonster]

"Although Mars' atmosphere is comprised of vastly different elements than Earth's and is approximately 100 times less dense than our own, the planet does have clouds."

Major constituents of the dry¹ atmosphere of Mars:
95.9% carbon dioxide (CO₂);
2% Argon (Ar);
1.9% Nitrogen (N₂);
0.14% Oxygen (O₂).

Major constituents of the dry atmosphere of Earth:
.04% carbon dioxide (CO₂);
0.93% Argon (Ar);
78.08% Nitrogen (N₂);
20.95% Oxygen (O₂).

Doesn't sound like "vastly different elements" to me. Author doesn't know what he is talking about.

1. "Dry" atmosphere excludes highly variable water vapor constituent.

[ETL]

Doesn't sound like "vastly different elements" to me.

It does seem as if some science writers don't know all that much about science themselves, and so sometimes misinterpret what the scientists and/or their spokespeople tell them.