Complex sentence: Now it appears that some may have made the crossing of a younger, much narrower Atlantic Ocean: a notable discovery was the miniature skull of a delicate progenitor of New World marmosets and tamarins; it has been given the name "Chilecebus carrascoensis".
Split into simpler sentences: Now it appears that some may have made the crossing of a younger, much narrower Atlantic Ocean. A notable discovery was the miniature skull of a delicate progenitor of New World marmosets and tamarins; it has been given the name "Chilecebus carrascoensis".