Why on earth donkeys arose has always been one of the great mysteries of natural history. Until now

When we think about the animals that have been accompanying humans since time immemorial, helping us in agricultural and daily tasks, surely the first candidates are horses, dogs, and even cats. Probably the donkeys (Equus africanus asinus) are a little further down the list. Until now we believed that the domestication of the donkey was an event that was repeated in different places and times in prehistory. However, the largest genetic study of these animals carried out to date revealed a different story: that of a single domestication of the donkey, which occurred about 7,000 years ago in the area around the Horn of Africa and what is now Kenya. The closest relatives of the domestic donkey, wild donkeys (Equus africanus) still live today in this African region. The common donkey is sometimes seen as a subspecies of these African donkeys or as an independent species closely related to it (in which case its “scientific” name would be Equus asinus). According to the team, led by French researchers, the donkey was domesticated in this context, and then began to spread throughout the rest of Eurasia, already as a domestic animal about 4,500 years ago, that is, about 2 and a half millennia after being domesticated. The genetic study has not only pointed out the unique origin of this species, but It has also “advanced” the date of domestication by about four centuries. The domestication of the donkey would have made sense in its spatiotemporal context. About 7,000 years ago the Sahara environment witnessed an aridification process that led the desert to expand. The donkeys they had an advantage Compared to other equids, they are more resistant to lack of water, which could have made them ideal for use as an aid in transportation or agricultural work. For their analysis, the international team of researchers analyzed samples of 207 modern donkeys from 31 countries, as well as remains of skeletons of 31 other donkeys who lived in the last 4,500 years. They also used genetic information from other equids to expand the study. The work of the researchers was published in the journal Science. The variety and the mules The study also offers us some curious stories about this animal. For example, genetic analysis of Roman-era remains found in France tells the story of a generation of giant donkeys (up to 25 centimeters larger than the average modern donkey). The Romans They didn’t raise these donkeys colossal for their direct use, but because mules (crosses between male donkeys and horse mares) were of great use to them. The Romans took advantage of an animal that combined part of the robustness of donkeys with the ability to travel long distances more typical of horses. After the fall of the Roman Empire, mules once again gave way to donkeys since economies had become more local, so it was not necessary to use them to transport large loads along the popular Roman road network. The donkey is perhaps the most maligned of domestic animals. Despite having played a key role in human development over the past four millennia, the donkey is often seen as synonymous with stupidity or clumsiness. Such is the point that the donkey has become a threatened species in places like Spain or Mexico. For better or worse, the donkey continues to form part of our cultural heritagefrom the donkey with which Sancho Panza accompanied Don Quixote to that of Friar Perico. Now, thanks to science, we know a little more about the history of what could be the least popular cousin of the equine family. In Xataka | The Iberian lynx is reconquering Spain and that is good news. The challenge now is to understand why In Xataka | Science had always believed that only humans understand geometry. Until we noticed the crows again Image | Ansgar Scheffold

Canopo’s decree is one of the greatest mysteries to solve the ancient Egypt. And finally we have a key track to understand it

Egyptologists and especially those scholars dedicated to the study of hieroglyphs and The Ptolemaic dynasty They are in luck. And rightly. A team of archaeologists has located in the site of Tell el-Faran´inin the city of The Husseiniya (Sharqia), an unparalleled treasure in the last century and a half. Not because of the materials with which it is manufactured or its lavishness. No. The key is what he says, how he says it and above all what he does not say. What experts have found is neither more nor less than a famous stone trail Canopo decree. Of course, a very special. What is Canopo’s decree? A Egyptian decree promulgated by the king Ptolemy III Evergetes on a deck of 238 AC, in full Ptolomeics dynasty. The document was written after the high priests met in the city of Canopusto the east of Alexandria, to honor the monarch, his wife Berenice and the little daughter of both, who died by those same dates. It may sound boring, but the decree has been fascinating the Egyptologists. The text exalts the figure of the monarchs (“The benevolent gods”), their donations, campaigns and veneration in the temples. Also of more practical issues, such as the decision to lower taxes those years in which crops did not receive enough water from the Nile, or the creation of a new priestly range and a religious holiday. Another of the ads that it collects is the deification of the deceased daughter of Ptolemy III Evergetes and Berenice, which was called as her mother. Does it say anything else? Yes. Among other issues, the introduction of a new system of leap years which would add an extra day every four years to adjust it to religious rituals. Ptolemy III wanted that additional day to commemorate him and his wife, but the idea He didn’t finish curdling. Today it reminds us how advanced Egyptian astronomy was and how it advanced to Julian calendarintroduced by Julio César in the 46 AC replacing the Roman. Beyond what he says, the decree is valuable for how he says it. The document makes it clear that its content should be expressed in stelae that mixed three different writing systems: Egyptian hieroglyphs, The demotic and The Greek Koiné. The copies should also be distributed among the main temples for the edict to reach every corner of the kingdom. When in the nineteenth century the archaeologist Karl Richard Lepsius He discovered one of those specimens in Tanis, he found a valuable help to decipher the hieroglyphs. So or even more than Rosetta stone. How is the new wake? Of sandstone, 127.5 centimeters high and 83 wide, with a thickness of 48. Its upper part is rounded and, in addition to the registration of the central section, distributed over 30 hieroglyph lines carved in relief, the stone shows some interesting decorations. The design is crowned by a large winged solar disk flanked by two royal cobras that show the white and red crowns of Egypt, symbol of the union of the two lands. In the center, an inscription stands out in which “Di-Ank” can be read, a message that could be translated as “the one that gives life.” Why does the finding matter? Because the copies of Canopo decree do not abound. Or at least we have not found them. As remember The Ministry of Tourism and Antiquities of Egypt, the wake found in Tell el-Faran´in will join the other six known and unearthed versions inKom el-hisn, Tanis either Tell enough. Some are complete. Another are just fragments. “This discovery is considered the most significant of its kind in more than 150 years, since since then no new and complete version of the decree has been found,” Underline. Does it differ in something? Yes. And that is one of the reasons why the wake recovered in Tell el-Faran´in has generated so much interest. Although the decree of Ptolemy III made it clear that it should be captured in stelae that combined the three writing systems (hieroglyphic, demotic and Greek), the specimen we just found shows only one. This was confirmed by Mohamed Ismail Khaled, of the Supreme Council of Antiquities, who Clarify that the wake is written “entirely in hieroglyphs”, which differentiates it from other previous trilingual versions. What is it for? Beyond the obvious historical, archaeological and patrimonial value of the finding, Tell el-Faran´in wake has a key utility. From the outset, it has served the Egyptian Minister of Antiquities, Sherif Fathy, to breastfeed for the “continuous achievements” of the archaeological missions of the country and the “support” of the government to the excavation campaigns, something that feels especially good in full controversy by the Tourist megaproject of the Sinai. Political issues apart, scholars are relying on squeezing the content of the wake. The authorities expect them to help them expand their knowledge about the real and religious documents of the Ptolemaic era and “enrich” the understanding of that historical period. If something has aroused interest, it is, however, that the stone includes a single writing system, which seems an exception to the norm that includes the decree. “Open new horizons for our understanding of the language and provides additional information about Ptolemaic decrees, as well as about real and religious ceremonial systems,” Add the government. Images | Ministry of Tourism and Antiquities, Egypt government and Wikipedia In Xataka | A 2,000 -year -old cup has revealed an unexpected facet of the Egyptians: psychedelic cocktails

We know more than Mars than the seabed. An expert helps us to understand why it is still an enigma and what mysteries keep

What if we told you that there is such a tiny creature that it can hunt generating a bubble at more than 100 km/h, with a temperature similar to the sun? What if the orcs were smarter than we believe, even capable of having bait traps or hunting the very blue whale? The bottom of the sea It is still a place full of mysteries. We think we know him because we have seen documentaries or movies, but we have barely scratched his surface. Science and separate With a new episode On our YouTube channelalso available as Podcast on Spotify and Ivoox. A space in which we address scientific issues from a close and informative approach. In this second installment, our partner Ángela Blanco talks with Álex Avelloethologist and disseminator, to explore the amazing behavior of marine animals and everything we still do not know about the ocean. The pistolera gamba is one of those animals that costs to believe that they really exist. It is tiny, but its way of hunting has nothing subtle: it closes one of its tweezers to more than 100 km/Hy generates a bubble whose temperature, according to some studies, could approach the surface of the sun. “This always caught with tweezers too, a little above, a little below,” says Alex. The click is so brutal that it can be detected by the sound of a submarine. If the puppets can submerge up to 3,000 meters is not only because of their size or strength, but by a fascinating biological mechanism. “It has an organ that is called sperm … I always say it is like a bag full of wax, a wax -full supermarket,” explains Álex. When they prepare to descend, they let cold water into that organ, which solidifies the wax and turns their heads into a natural ballast. “In this way they go down to every tablet,” he adds. While they descend, they emit clicks that bounce with everything they find, as a kind of sound. There is an idea that is repeated throughout the episode: we barely know what is in the depths. “We know 4% of all oceans,” says Alex. And that leaves a lot of room for imagination. “Today, to me someone comes to make sure Megalodon is impossible for it to exist …”Every time he gives a talk in schools, children ask him about mythical sea creatures. And his answer is not a resounding. Because the truth is that we have not yet reached there. Are dolphins smarter marine animals? Álex clarifies: “Orca is within the family of dolphins … but the orca is superior to the dolphin. In fact, the orcs hunt dolphins, the dolphins do not hunt orcas.” What comes later in the conversation ends up clarifying why. And it is worth listening. Not all animals eat what they are in front of them. Some know how to wait. “Have that ability to say: ‘Ok, I have this that I can eat it right now, But I can use it as a tool… ”, Recalls Álex when talking about an orca who saw in a video as a child. What he did with that fish is difficult to forget. He tells him in detail in the episode. This is not all. In the second episode of science and apart there are more stories that surprise, that make them think and that remind us of everything we do not know yet. You can see or listen to it. Where do you prefer. Images | Xataka In Xataka | There are thousands of people hooked to streaming. One to 3,900 meters deep full of marine curiosities (and memes)

The James Webb has just photographed one of the great mysteries of the universe’s galaxies: how they intertwine

How many galaxies fit in an image? In the instruments of the James Webb space telescope (JWST), at least, many: hundreds. And even thousands. From close to the distant. The image taken by the JWST (with the help of the veteran hubble) and published by the European Space Agency (ESA) It shows us objects in a wide range of distances: from stars located within our own galaxy (easy to distinguish thanks to The characteristics six points of diffraction of this telescope) to distant galaxies in space and in time. The “star” of the image. However, according to Explain the agency itselfthe main protagonist of this capture is none other than a cluster of galaxies that we can see below the center of the image, a distant group of galaxies that shines in a mixture tone of white and gold. This group emerged about 6.5 billion years after the Big Bang, when the universe as and as we know it was somewhat less than the age it is now. The importance of this group lies in the fact that more than half of the galaxies we know can be found in similar groups, so studying it can help us understand more about how these groups that make up the greatest structures linked through the force of gravity are formed, says ESA. Cosmos-Web. The outstanding group is the largest galactic cluster in the region called Cosmos-Web Field. COSMOS (Cosmic Evolution Survey) It is a survey that uses telescopes such as webb, hubble or the XMM-Newton Space Observatory of ESA to explore the spaces and space phenomena that occurred in that celestial region. He Cosmos-Web program It seeks to take advantage of the high abilities of the JWST and instruments such as the Nircam filters on board to explore and map an area of ​​0.54 square degrees of the celestial vault, a little more than twice and a half times the area that occupies the full moon in our sky. This power of the instruments of the orbital telescope should allow us to understand how galactic clusters formed, taking us at a time when the universe was only 1.9 billion years old, 14% of their current age. This is intended to meet three objectives: identify galaxies at the time of reion (when the first stars were “caught”; probe the formation of the most massive galaxies; and understand the relationship between the mass of the stars in a galaxy and The galactic halo that “wraps.” “Galaxies feast ”. In its publication, ESA has given some additional details about the image we see. They explain, this combines nircam images (Near-Infrared Camera) with Hubble observations to present ourselves “a visual feast of galaxies.” In capture They can be seen galaxies of different types and even pairs of galaxies in the process of merging. The European Agency He also explains The interpretation of the colors of the galaxies: the galaxies that tend to the bluish tones are those in which young stars predominate, while the most old are older; either because of the color of the stars inside, either because they are further in space and therefore in time. The latter is the effect of the phenomenon called Redshift or red shift. Galactic evolution. Images like this have to tell us about the evolution of the universe and, above all, of galaxies like ours. The gravitational interaction between galaxies (more or less) close affects what happens within the same galaxies, such is the mass that these groups accumulate. And not only that: collisions and mergers between galaxies in the same group also condition what happens in these. An example can find it when the nearby step of two galaxies of different size allows a huge clouds of matter “start”, or it can Cause a “burst” that quickly consumes the gas of this. In Xataka | The James Webb has found a galaxy when the universe was 330 million years old. Hide an entire enigma Image | Es es/Webb, Nasa & Csa, G. Gozaliasl, A. Koekemoer, M. Franco, and The Cosmos-Web Team

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