Note 14 — Chapter I · PREHISTORIC RACE MOVEMENTS IN AFRICA
Reading edition
Yet from two to ten thousand years ago, the Comoro island chain was probably larger and approached much nearer to the mainland, thus permitting Madagascar to be reached (by swimming) by two or three species of hippopotamus (now extinct) and by the bush-pig which still exists there. It is very improbable that either of these mammals could have swum the distance of 200 miles which now separates East Africa from the nearest Comoro Island.