However, in 2019, a study in Science Advances called that dogma into question.
However, in 2019, a study in Science Advances called that dogma into question. The researchers looked at decades of research on primate vocalizations and anatomy, for example, research that found that the macaque, an Old-World monkey, has the necessary anatomy to support spoken language and is quite capable of distinctly producing the vowel sounds, “bit,” “bet,” “bat,” “but,” and “bought.”