This is a portrait of Boyan Petrov, a zoologist and a mountaineer, who's climbed eight eight-thousanders, all without supplementary oxygen. He is the Bulgarian altitude-climber with highest number of 8000+ peaks. 

Boyan is a cancer survivor and a diabetic. In 2008 he fell while climbing in the Alps and broke his leg. In 2013 Petrov suffered a car accident and received a new fracture on one of his legs. Despite of that the following year he successfully climbed Kangchenjunga, Broad Peak and K2 with internal fixators in this leg.

I read through all of these details before we met and to this day his determination and unquestionable drive to strive forward, to look onward to the next challenge is something I replay in my head.