Khaybar: A Saudi Town of Water Springs, Forts and Volcanic Craters

Qamus fortress in Khaybar
Qamus fortress in Khaybar
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Khaybar: A Saudi Town of Water Springs, Forts and Volcanic Craters

Qamus fortress in Khaybar
Qamus fortress in Khaybar

With its farms, springs, volcanoes, and forts, Khaybar combines historic charm and breathtaking landscape on a unique piece of land in the Madinah region in Saudi Arabia.

Khaybar, which used to be home to more than three hundred running springs, was a significant economic hub in the Arabian Peninsula due to the abundance of its natural resources, including wells and impenetrable fortifications.

Asharq Al-Awsat toured its most prominent castles and forts, which have witnessed many important events throughout history since its establishment by the Amalekites, an Arab tribe that has died out.
The name Khaybar was mentioned in the book of the Assyrians as one of the areas captured by the Babylonian King Nabonidus, and he ruled over it between 555 and 538 BC. Some evidence and archeological findings indicate that humans have inhabited the area since the Stone Age.

According to Saifi al-Shalali, who does research on Khaybar's history, the city was known as Hijaz’s periphery in the past. Indeed, Said bin Muhammad bin Ahmed al-Afghani, author of the book “Arab Markets in Jahiliyya,” says it was the financial center of the Arabian Peninsula. Its economic importance stemmed from the expansion of its agricultural land and its abundance of water. It was a fertile ground for thousands of palm plantations.

Khaybar was also famous for its famous market (Nattah Khaybar Market), classified as one of the twelve most important Arab markets during the Jahiliyya period (pre-Islamic Arabia). All kinds of goods from all over the Arabian Peninsula were available, including all sorts of weapons, textiles, carpets, animal products such as margarine and honey, household utensils and other items.

The primary commodity, simultaneously a currency and a commodity, was dates. Trade in this market was conducted either with the coins available at the time or through bartering for and with dates.

The market would boom in the summer, date season, when most Arab merchants would meet to exchange their goods for dates.

Shalali says there is reason to believe that humans have inhabited it for tens of thousands of years, like tools made of stone that seem to date back to the Stone Age found by archaeologists.

Khaybar was known by its rugged terrain, and this is what drew the humans who settled there years ago. This is also what encouraged its early inhabitants to build many forts to protect it against invasions. The most prominent of which is the fortress of Al-Qamus, which stands like a ship in a sea of palm trees that surround it from all sides. Other forts in Khaybar are distinguished by their geographical location and strength including Al-Saab Bin Muadh Fort, Al-Qalaa, Quilah, Aby, Al-Nizar, Al-Watih and Al-Salalim.



Scientists Seek Miracle Pill to Stop Methane Cow Burps

A cow that's part of study on reducing methane emitted by cow burps stands in an exclosure at UC Davis in Davis, California on October 23, 2024. (AFP)
A cow that's part of study on reducing methane emitted by cow burps stands in an exclosure at UC Davis in Davis, California on October 23, 2024. (AFP)
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Scientists Seek Miracle Pill to Stop Methane Cow Burps

A cow that's part of study on reducing methane emitted by cow burps stands in an exclosure at UC Davis in Davis, California on October 23, 2024. (AFP)
A cow that's part of study on reducing methane emitted by cow burps stands in an exclosure at UC Davis in Davis, California on October 23, 2024. (AFP)

A scientist guides a long tube into the mouth and down to the stomach of Thing 1, a two-month-old calf that is part of a research project aiming to prevent cows from burping methane, a potent greenhouse gas.

Paulo de Meo Filho, a postdoctoral researcher at University of California, Davis, is part of an ambitious experiment aiming to develop a pill to transform cow gut bacteria so it emits less or no methane.

While the fossil fuel industry and some natural sources emit methane, cattle farming has become a major climate concern due to the sheer volume of the cows' emissions.

"Almost half of the increase in (global) temperature that we've had so far, it's been because of methane," said Ermias Kebreab, an animal science professor at UC Davis.

Methane, the second largest contributor to climate change after carbon dioxide, breaks down faster than CO2 but is more potent.

"Methane lives in the atmosphere for about 12 years" unlike carbon dioxide which persists for centuries, Kebreab said.

"If you start reducing methane now, we can actually see the effect on the temperature very quickly."

Filho uses the tube to extract liquid from Thing 1's rumen -- the first stomach compartment containing partially digested food.

Using the rumen liquid samples, the scientists are studying the microbes that convert hydrogen into methane, which is not digested by the cow but instead burped out.

A single cow will burp roughly 220 pounds (100 kilograms) of the gas annually.

- 'Social critters' -

Thing 1 and other calves receive a seaweed-supplemented diet to reduce methane production.

Scientists hope to achieve similar results by introducing genetically modified microbes that soak up hydrogen, starving methane-producing bacteria at the source.

However, the team proceeds cautiously.

"We can't just simply cut down methane production by removing" methane-making bacteria, as hydrogen could accumulate to the point of harming the animal, warned Matthias Hess, who runs the UC Davis lab.

"Microbes are kind of social critters. They really like to live together," he said.

"The way they interact and affect each other impacts the overall function of the ecosystem."

Hess's students test different formulas in bioreactors, vessels that reproduce microorganisms' living conditions in a stomach from movements to temperature.

- More productive cows -

The project is being carried out at UC Davis as well as UC Berkeley's Innovative Genomics Institute (IGI).

IGI scientists are trying to identify the right microbe -- the one they hope to genetically alter to supplant methane-producing microbes.

The modified microorganisms will then be tested at UC Davis in the lab and in the animals.

"Not only are we trying to reduce methane emissions, but you also increase the feed efficiency," said Kebreab.

"Hydrogen and methane, they are both energy, and so if you reduce that energy and redirect it to something else... we have a better productivity and lower emissions at the same time."

The ultimate goal is a single-dose treatment administered early in life, since most cattle graze freely and can't receive daily supplements.

The three research teams have been given $70 million and seven years to achieve a breakthrough.

Kebreab has long studied sustainable livestock practices and pushes back against calls to reduce meat consumption to save the planet.

While acknowledging this might work for healthy adults in developed nations, he pointed to countries like Indonesia, where the government is seeking to increase meat and dairy production because 20 percent of children under five suffer from stunted growth.

"We can't tell them to not eat meat," he said.