300 times per minute. Five times per second. That is the slowest flap ever recorded in an insect and it is enough for it to fly.

This milestone is marked by macaon either king butterfly (Papilio machaon).

Machaon

It is one of the best known and most beautiful butterflies in Europe, and It is also very common in the Iberian Peninsula (not so in the Atlantic islands or Ireland, and in England it is barely widespread).

Has between 32 and 80 mm wingspan and is characterized by its black and cream-yellow wings. The lower wings have red ocelli and have tails.

The "dust" that covers the wings of butterflies and moths is, in fact, a network of tiny scales composed mostly of chitin, the second most abundant natural polymer after cellulose.

What is the macaón butterfly called in other languages? English: Old World swallowtail; French: Le Grand porte-queue; Italian: macaone; German: Schwalbenschwanz.

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The news

The insect with the slowest flapping of all moves its wings "only" 5 times per second

was originally published in

Xataka Science

by
Sergio Parra

.

From a scientific point of view, perhaps the only people you could consider to be non-immigrants would be some Khoe-San speaking groups in southern Africa, as explained Austin Reynolds, assistant professor of anthropology at Baylor University in Texas specializing in Human Population Genetics.

The designation Khoe-San refers to certain African communities in the areas of Botswana, Namibia, Angola and South Africa who speak similar languages with distinctive consonants.

Last genetically Aboriginal people

Joisan, Khoisan or Khoisanid are terms that define an important African population group in a cultural, ethnic, linguistic and racial sense; It comes from the union of Khoi (Khoikhoi) and San, main groups that speak one of the Joisan languages, characterized by incorporating clicking or clicking sounds.

There are two main factors that indicate that the Khoe-San groups they may be non-migratory descendants of the original humans: They live where humans likely first appeared and have a large amount of genetic diversity.

This happens because some types of genomes came from this place, but there were more in the original site.

In Xataka Science

We are all descendants of 14,000 sub-Saharans

However, despite the Khoe-San groups' proximity to the proverbial 'cradle of humanity' and their significant genetic diversity, identifying them as the last genetically aboriginal peoples is not easy.

First of all, researchers are not sure that southern Africa is the cradle of humanity. Some scientists think that humans first evolved in East Africa.

Other researchers do not believe there are any people left on Earth who are not, at least scientifically, immigrants. That is all human populations have been in contact with other, including the Khoe-San.

–
The news

Scientifically speaking, the only people who are not immigrants are some Khoe-San in southern Africa

was originally published in

Xataka Science

by
Sergio Parra

.