Final answer:
Cultural anthropologists and archaeologists have recently been included in investigations of crimes against humanity.
Step-by-step explanation:
The specialists that have recently been included in investigations of crimes against humanity are both cultural anthropologists and archaeologists. Cultural anthropologists use participant observation to understand how different features of culture fit together in contemporary societies, while archaeologists use material artifacts to gain insights into the technologies and social practices of ancient peoples. Both of these specialists contribute valuable expertise in understanding crimes against humanity.