Diet-related changes in human bite spread new speech sounds

16 Mars, 2019, 21:11 | Auteur: Therese Cote
  • SPeaking

However, a study published yesterday in the journal Science suggests that some sounds - including "f" and "v" - are new additions, appearing only 3,000 to 6,000 years ago. In other words, language also changed along with diet. As per some linguistic experts, most humans share identical biological tools and sound-making abilities for spoken languages. The languages are not only generally unintelligible between one another, but they can also be radically different in the way sounds that convey meaning are produced.

This research contradicts the prevailing view that all human speech sounds were present when homo sapiens first evolved around 300,000 years ago. Humans who consumed soft food, had less eroded teeth, which led to the formation of a section in which incisors of the upper jaw became more evident than in the lower jaw in adults. When humans started eating softer food like cheese, tooth wear became less pronounced and as a result, more and more people kept an overbite into adulthood. These sounds are made by touching the lower lip to the upper teeth, as when pronouncing the letter "f".

"In Europe, our data suggests that the use of labiodentals has increased dramatically only in the last couple of millennia, correlated with the rise of food processing technology such as industrial milling", said study co-first author Steven Moran, a linguist at the University of Zurich in Switzerland.

"The set of speech sounds we use has not necessarily remained stable since the emergence of our species, but rather the enormous diversity of speech sounds that we find today is the product of a complex interplay of factors involving biological change and cultural evolution", said University of Zurich team member Steven Moran.

However, this did not mean they definitely would be. Human speech organs do not use all that much energy to begin with - not relative to movement, for instance.

Manchester United boss Solskjaer rejects Neville's remarks on priorities
Any move for Bale or another high-profile wide player would surely mark the end of Alexis Sanchez's forgettable spell with United .

Push to defeat IS in Syria slowed by concern for hostages
The Syrian Observatory for Human Rights, a war monitoring group based in Britain, said two women had carried out suicide blasts.

Kylie Jenner donne une classe de maître de maquillage pour maman
C'est ça!" Mais Kendall, dont la carrière sur les podiums lui a valu le titre de mannequin le mieux payé de 2018 par le magazine Forbes, n'est pas la seule sur la liste d'attente des collab de Kylie Cosmetics.

Human speech is incredibly diverse, ranging from ubiquitous sounds like "m" and "a" to the rare click consonants in some languages of Southern Africa.

The researchers used biomechanical models replicating human speech and determined that labiodentals require about 30% less muscular effort in the overbite model compared with the edge to edge bite. In the future, the researchers believe that their method could be used to reconstruct how ancient written languages were spoken aloud.

"I hope our study will trigger a wider discussion on the fact that at least some aspects of language and speech-and I insist, some-need to be treated as we treat other complex human behaviors: laying between biology and culture", said Damián Blasi, lead author of the study. They analyzed a database of roughly 2,000 languages - more than a quarter of languages in existence today - to identify which sounds were more and less frequently used, and where.

Thousands of years ago, when humans began cooking or preparing their food in other forms, the structure of their teeth altered, and thus, eased the pronunciation of certain letters that are today involved in several worldwide languages, as explained the researchers in their study published Thursday in the Science Magazine.

Conseillé:



Populaire

Senator Who Blamed Muslims For New Zealand Shootings Punches Teen After Egging
Anning's supporters then scuffled with the young man while a staffer pulled the lawmaker away from the altercation. He was late released by the police without any charge.

Milo Yiannopoulos Not Allowed in Australia After New Zealand Mosque Shooting Comments
Coleman added that the attack, which left at least 49 Muslim worshippers dead and dozens injured, was " pure evil ". Twitter banned Yiannopoulos, who is British but has lived in the USA , from its platform in 2016.

Moha La Squale poursuivi pour menaces de mort
Le rappeur du XXe arrondissement de Paris devra se présenter en septembre au tribunal après une altercation à la Réunion. La victime était attablée avec sa femme à côté de la table de l'artiste, vraisemblablement un peu ivre ce soir-là.

Witness in Berlusconi's bunga-bunga trial 'poisoned'
Mr Berlusconi - who has served as prime minister in four governments - is still facing a number of charges, including bribing. In 2012, Fadil testified at Berlusconi's trial, in which he was accused of paying for sex with an underage prostitute.

Christchurch shooting suspect appears in New Zealand court
NZC CEO David White said his organisation endorsed the process and the wishes of the players at such a traumatic time. New Zealand's Prime Minister, Jacinda Ardern , said the gunman meant to continue his attack if he hadn't been stopped.

Frost makes history at Cheltenham
The Emma Lavelle-trained 7-year old came home ahead of 33-to-1 chance Sam Spinner, with Faugheen third at a price of 4-to-1. He's good, so let's enjoy him over hurdles and he's only seven. 'But I keep stressing, this is not just me here.

Le prochain James Bond en mode électrique — Aston Martin
Amateur de belles voitures, James Bond deviendra donc un ambassadeur de l'électrique de choix. Au casting, Daniel Craig mais aussi Rami Malek, Léa Seydoux ou encore Ralph Fiennes .

Boulaya buteur face à Niort — France
Clermont a aussi enregistré une belle victoire face au dernier, le Red Star (4-0), avec notamment un triplé de Florian Ayé. En déplacement à Châteauroux , le Paris FC a une fois de plus fait preuve de solidité avant de trouver la faille (0-1).

Monaco s'offre le dauphin Lille sur le fil
S'ils restent dauphins, à 17 points du PSG, ils ont manqué l'opportunité de reléguer l'OL à 10 longueurs. Lille s'est incliné pour la première fois en 2019 en championnat.

'Bomb cyclone' pushes east across US after winter siege
Denver Public Schools was one of many school districts that canceled school because of poor road conditions and power outages. Residents were being urged to stay off the roads during the duration of the storm, CBS Denver reported .