It's the same as the other face hoaxes, it's a mirage created by light and shadow. You can see the sun hitting the snow on the left side. The right side of the image is shaded and the mouth, nose and eyes are completely in shadow. If you took a picture a couple hours earlier or later it would look like a mountain and a pile of snow.
Human brains are wired to see faces in all sorts of stuff. It's why Jesus appears on tortillas, and why there's a man on the moon. It's called Pareidolia, here's a link to the wiki page about it.
https://en.wikipedia.org/wiki/Pareidolia
I made fun of the pyramids of Antarctica but they really do look like pyramids. You can see them anywhere there's mountains buried in snow. They're called nunataks, mountains that protrude from snow fields or glaciers. Here's another wiki article link.
https://en.wikipedia.org/wiki/Nunatak
The snow can't pile up on the top because the angles are too steep. This creates sharp angles between the rock and snow that look artificial and man-made. There's similar pyramid shaped peaks all over the world, here's a link to one in Bulgaria that's got a convincing pyramid type shape.
https://en.wikipedia.org/wiki/Pyramidal_peak#/media/File:Konceto_and_Vichren.jpg
They're not rare, you find them anywhere there's wind and ice causing erosion. The Matterhorn is a famous one.
Excellent points.
The great thing about SCIENCE is that it's true, no matter if you believe in science or not.
Here's the face on Mars
Each picture was taken on a different date, at different times of the year. It's a perfect example of Pareidolia.
But as they say, you can't reason a person out of a position they've reasoned themselves into.