When I see PETA in the website name I have think Hmmm, is PETA involved? Are they trying to get us to help build them a map of all the bird places they’d want to protect? More private property restrictions on the way? It’s just the cynic in me, I guess.
“PETA” in this case, is short for “Petabyte” which is a unit prefix in the metric system.
A pixel is something you’re free to google on your own if you need an explanation.
Put ‘em all together and you get: Petapixel.com, which is a (terrific) photography website.