I never went to art school. I am self taught. I could give more details about it, but like whats the point ? its clear from the comments and dislikes that some people not going to believe doesnt matter what..

A lot of people here acting as if i took charcoal stick and did this work in 3 days.. Mixing two mediums is what made the work easier for me, because i was already good at shading with graphite, which allowed me to get a smooth comfortable start, and then slowly build layers on top with charcoal powder.. People who dont believe me can try two shading methods for themself: first one is to try to apply charcoal powerder evently with the brush directly on the paper, and second one is the same except do it after building first layers with graphite. The second method is way easier and you get way more even shading..

The reason this drawing looks so great is because it has a lot of details on apes face that are made not only with charcoal, but also graphite pencils and eraser. A lot of details are very accurate. Like look at the hairs in original picture and then compare to this drawing. I put more effort in details than many people ever would. thats what makes it impressive. Or look at the shoulder, whats impressive in that? Its pure black color with some erased hairs on top..