Simplify the following text for a Grade 12 native English-speaking person.
Original: Fossils of tarsiiform primates are found in Asia , Europe , and North America , and there are disputed fossils from Africa , but extant tarsiers are restricted to several Southeast Asian islands including the Philippines , Sulawesi , Borneo , and Sumatra .
Simplified: Once found in Asia , Europe and North America , tarsiers are now only found on several Southeast Asian islands including the Philippines , Sulawesi , Borneo , and Sumatra .