NASA’s early space missions sent monkeys into orbit to study the effects ... tests may have unintentionally revealed clues about human evolution. Could these experiments have uncovered hidden ...

Professor Tecumseh Fitch, an expert in human vocal evolution from the University of Vienna and a co-author of the study, said: “Our study shows that vocal membranes extend the monkey’s pitch ...

According to a new paper published in the Philosophical Transactions of the Royal Society B, Biological Sciences, several species of monkey ... humans have lost over the course of evolution ...

Apes and monkeys possess special anatomical structures in their throats called vocal membranes, which disappeared from humans through evolution to allow for more stable speech. However ...

Professor Tecumseh Fitch, an expert in human vocal evolution from the University of Vienna and a co-author of the study, said: "Our study shows that vocal membranes extend the monkey's pitch range ...