He wanted to know everything. What's the cat's tail for? Do dogs dream? What kind of civilization could bees create? Are continents rising or sinking? Where did life on Earth come from? Who is smarter, male or female, and why? He solved nature's mysteries like Sherlock Holmes and articulated his findings poetically like Dickens. Already an old man, crowned with all the learned regalia of the world, he timidly wrote to his colleague: "You know so much, and I know so little, and I ask you for alms, like a beggar..." He avoided public controversy except when it was very important to him. And it was also important that Turkey offended Bulgaria, and that the neighbor offended the horse. The author tells about the discoveries and about the life of this amazing person in detail and fascinatingly, relying exclusively on facts and documents.