In 1747 he was commissioned by the Royal Swedish Academy of Sciences to travel to the North American colonies and to bring back seeds and plants that might be useful to agriculture. Among his many scientific accomplishments, Kalm can be credited for the first description of Niagara Falls, along the border of New York (United States) and Canada, written by someone trained as a scientist. In addition, he published the first scientific paper on the North American, 17-year periodical cicada Magicicada septendecim.
We also got to see their extensive collection of children's books. Which included the Moomins (Swedish: Mumintroll, Finnish: Muumi) who are the central characters in a series of books and a comic strip by Swedish-Finn illustrator and writer Tove Jansson, originally published in Swedish in Finland. They are a family of white, roundish fairy tale characters with large snouts that make them resemble hippopotamuses. The carefree and adventurous family live in their house in Moominvalley, though in the past their temporary residences have included a lighthouse and a theatre. They have had many adventures along with their various friends.