There are other skin tones but you're right it's mostly white people. However it's worth baring in mind that this is an old site. Wayback machine has it at 2012

There are other skin tones but you're right it's mostly white people. However it's worth baring in mind that this is an old site. Wayback machine has it at 2012. I'm sure I've read an explanation that said each image was manually curated and then the angle of the pointing manually plotted. So I wouldn't say there's any algorithm bias beyond whatever images the author had access to at that point (no pun intended) in time.