Marmosets seem to call each other by name

Marmosets use unique calls for other monkeys in their family groups, similar to how humans call each other by name. They are the first non-human primates known to do so. This discovery shows that communication in marmosets is more complex than previously thought, and it could help teach us more about how human language evolved. "Up till quite recently, people thought that human language is a singularity phenomenon that popped out of nothing," says David Omer at The Hebrew University of Jerusalem. "We're starting to see evidence that this is not the case."