Complex sentence: Since they experience only a modest decline in body temperature (3-5 ° C) compared to what other hibernators undergo (32 ° C +), many researchers thought that their deep sleep was not comparable to true, deep hibernation.
Split into simpler sentences: Since they experience only a modest decline in body temperature (3-5 ° C) compared with what other hibernators undergo (32 ° C +). Many researchers thought that their deep sleep was not comparable with true, deep hibernation.