Original sentence: There are several variants on the broad theme that early or proto-humans lived in close proximity to water, gathering much of their food in or near shallow bodies of water and developing and adapting new modes of locomotion in order to move and gather food (possibly including wading, swimming, and diving)
Edited sentence: However there are several variants on the broad theme that early or proto-humans lived in close proximity to water, gathering much of their food in or near shallow bodies of water and developing and adapting new modes of locomotion in order to move and gather food (possibly including wading, swimming, and diving).Morgan has pointed out that other hairless land-based species such as the elephants and the rhinoceroses also have aquatic ancestors, the main exception being the naked mole rat which lives underground