Complex sentence: The last deinothere species to become extinct was "Deinotherium bozasi", the youngest known specimens are from the Kanjera Formation, Kenya, about a million years ago (early Pleistocene).
Split into simpler sentences: The last deinothere species to become extinct was "Deinotherium bozasi". The youngest known specimens are from the Kanjera Formation, Kenya, about a million years ago (early Pleistocene).