Generally, animals living in cold areas are larger than their counterparts in warmer areas. This tendency is called Bergmann’s Rule. It is assumed to be a result of the adaptation of animals to cold environments.
For instance, the body of a polar bear is larger than that of any other kind of bear. The body surface area, per unit weight, of a large animal is smaller than that of a small animal. Consequently, heat emitted from the body of a large animal is relatively small, compared to a small animal.
The exhibits show the bodies of a Malay bear, a Japanese bear, a brown bear, and a Polar bear. Though they do not belong to the same species, they are all bears, of different body sizes. This difference has arisen from the temperature differences in the regions where they live.
Charles Darwin was born in Britain in 1809. At the age of 22, he made a round-the-world voyage on the HMS Beagle. Based on this experience, he devised the famous theory of natural selection. The basic tenets of Darwin’s theory are supported by scientists today.
However, it is little known that Darwin was a naturalist interested in plants, minerals and all other elements of nature. The section “The Room of Darwin” is so named to suggest this side of Darwin. Here, Robot Charlie―modeled after Darwin―explains, in plain terms, exhibited materials and facts about evolution.