Complex sentence: Many studies have been done on mouse phylogenies to reconstruct early human movements; for example one study showed a previously unsuspected early link between Denmark and Madeira on the basis of the origin of the Madeiran mice.
Split into simpler sentences: Many studies have been done on mouse phylogenies to reconstruct early human movements. For example one study showed a previously unsuspected early link between Denmark and Madeira on the basis of the origin of the Madeiran mice.