1. Eleven-year-old artist Dušan Krtolica takes doodling to the next level with his incredibly detailed pen-and-pencil drawings of wildlife.
7. Dušan drawings tend to feature animals that are both alive and extinct, ranging from birds, insects, prehistoric animals, but also people like medieval knights.
10. The young artist has a great memory for biology, and can recite all 65 species of marsupials by heart. After his parents gave him an animal encyclopedia, it took him less than three weeks to learn everything in it.
16. Despite his incredible talent, the 11-year-old said he hopes to become a zoologist when he grows up.