Final answer:
Human beings as we know them today did not exist 40 million years ago. However, there were other human species such as Neanderthals and Homo erectus living during that time period.
Step-by-step explanation:
The name of the humans that lived in 40 million BC is not known as human beings did not exist at that time. The earliest humans, known as Homo sapiens, appeared around 200,000 years ago in Africa. They were tall people with rounded skulls and steep foreheads, and their average cranial capacity was about 1,400 cubic centimeters.
However, it is important to note that there were other human species or subspecies living in different parts of the world during this time period. For example, Neanderthals lived in Europe and western Asia between 30,000 and 200,000 years ago. Homo erectus, a different species of human, was present in China more than a million years ago. It is also worth mentioning that there are fossil remains of early humans found in Europe and Africa that lived 300,000 to 800,000 years ago, which appear to be intermediate between Homo erectus and modern humankind.
To summarize, Homo sapiens, the species of modern humans, did not exist in 40 million BC. However, there were other human species or subspecies living during that time, such as Neanderthals and Homo erectus.