Teacher from another planet

On Pongea-28 there are multi-colored three-eared zaissi, speckled green mice, and hairy nocturnal butterflies the size of a palm; Pashtumel and Ginokko are extremely rare. In a small town on this planet, in a regular school, a not-so-ordinary teacher teaches... biology. His students are very different - some are interested in programming, others in drawing; some like to sing, others like to carve figures from wood, and others like to compose and tell horror stories. The teacher explains to all of them how important it is to take care of all living things. It seems that he knows everything about the inhabitants of not only Pangea-28, but also other planets - people turn to him for advice from different parts of the Universe. But how does he know all this?