The World Around Us

The adaptive radiation of the horse as seen against a habitat changing from woodland to open grassland.

The adaptive radiation of the horse as seen against a habitat changing from woodland to open grassland. The dentition reflects the change from browsing to grazing. The horse (Equus) became extinct in N America and was subsequently reintroduced. Gould (1997) comments that this diagram shows “nothing that anyone could identify as a central thrust amid the diversity”.

Credit: after MacFadden (1992)