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Tunisia's Sandy Beaches Eaten away by Coastal Erosion

A man looks on as a digger spreads sand on a beach in the tourist town of Hammamet as authorities fight to protect the coast from rising sea levels and erosion. FETHI BELAID / AFP
A man looks on as a digger spreads sand on a beach in the tourist town of Hammamet as authorities fight to protect the coast from rising sea levels and erosion. FETHI BELAID / AFP
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Tunisia's Sandy Beaches Eaten away by Coastal Erosion

A man looks on as a digger spreads sand on a beach in the tourist town of Hammamet as authorities fight to protect the coast from rising sea levels and erosion. FETHI BELAID / AFP
A man looks on as a digger spreads sand on a beach in the tourist town of Hammamet as authorities fight to protect the coast from rising sea levels and erosion. FETHI BELAID / AFP

In Tunisia's seaside town of Hammamet, bulldozers diligently shovel sand from a nearby desert onto a popular beach in an attempt to stop it from disappearing due to erosion.
"This beach is the postcard image of Hammamet," said environmentalist Chiheb Ben Fredj peering nostalgically at the town's iconic Yasmine beach.
"It has been seared in our minds since our childhood," he added, as laborers worked to restore the central Tunisian waterfront to its former sandy glory, reported Agence France Presse.
Like many other coastal areas in North Africa, severe erosion has led to many of Hammamet's sandy beaches vanishing in recent years, taking a toll on the holiday hotspot about 65 kilometers (40 miles) east of the capital Tunis.
Coastlines across the world are in a constant natural flux, with the seas claiming and depositing sediment.
But human activity, including coastal property development and offshore sand mining, significantly accelerates beach erosion.
Among other impacts, construction and coastal defenses in one area can stop sediment from traveling along a coastline, leaving existing beaches deprived of new material.
Studies have also shown the impacts of climate change, including rising temperatures and sea levels, exacerbate the phenomenon.
Tourism draw
In the Mediterranean, where the British National Oceanography Centre says sea levels have risen at a higher rate over the past 20 years than the entirety of the 20th century, shorelines are changing rapidly.
The sea is also warming 20 percent faster than the rest of the world, according to the United Nations.
Tunisia's coastline has been a major asset for the Mediterranean country with a struggling economy, as it aims to host some 10 million tourists this year.
Tourism accounts for up to 14 percent of the country's GDP, providing tens of thousands of jobs in a country where unemployment tops 16 percent and 40 percent among young people.
Tunisia has already lost more than 90 kilometers of beaches to erosion, according to official figures from last year.
Of the country's 570 kilometers of sandy beaches suitable for swimming, 190 kilometers are at imminent risk of disappearing, according to Tunisian reports.
A majority of the beaches most affected by erosion are located near cities.
Tunisia's environmental groups, as well as the government's Coastal Protection and Development Agency (APAL), blame the rapid erosion mostly on human activity and construction on the coast, which they say is further aggravated by climate change.
"Construction projects have not been designed to respect coastal dynamics," an APAL official told AFP.
'Not sustainable'
To save the Hammamet beach, one of Tunisia's worst-affected according to the World Bank, authorities last month began trucking in around 750 lorry loads filled with sand from the inland desert province of Kairouan, about 110 kilometers away.
APAL, which operates under the environment ministry, was in a race against time to refill the beach before the peak of tourist season.
But while the rebuilding of beaches, known as beach nourishment, may be a quick fix, "it's not a sustainable solution", said Ben Fredj.
"This sand may not last long," added the secretary general of the Environmental Education Association.
"It can be swallowed in a few days in the event of a storm", he said, as was the case in the summer of 2023.
The process can also prove expensive.
Coastal authorities estimated the cost of restoring sand to three beaches in Hammamet, Monastir and Sfax at 3.9 million Tunisian dinars ($1.25 million).
But for locals, restoring their priceless seafront is worth the money.
The Yasmine beach "is a showcase for Hammamet," said Narjess Bouasker, who runs the town's Menara hotel and leads the regional hotel federation.
"We must take back our beach that the sea has swallowed," she said, calling for a balance between safeguarding the landscape, cherished by locals and foreign visitors alike, and fighting coastal erosion.
"For us, the priority is not to touch the beauty of the city," she said.
Bouasker said she has seen increasing awareness among authorities, but refilling beaches with sand is still a gamble.
"We don't know how the sea will react", she added.

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Varieties

NASA's New Moon Rocket Heads to the Pad Ahead of Astronaut Launch

NASA's Artemis II SLS (Space Launch System) rocket and Orion spacecraft, secured to the mobile launcher, is seen inside the Vehicle Assembly building as preparations continue for roll out to Launch Pad 39B, Thursday, Jan. 15, 2026, at NASA's Kennedy Space Center in Florida. (Keegan Barber/NASA via AP)
NASA's Artemis II SLS (Space Launch System) rocket and Orion spacecraft, secured to the mobile launcher, is seen inside the Vehicle Assembly building as preparations continue for roll out to Launch Pad 39B, Thursday, Jan. 15, 2026, at NASA's Kennedy Space Center in Florida. (Keegan Barber/NASA via AP)
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NASA's New Moon Rocket Heads to the Pad Ahead of Astronaut Launch

NASA's Artemis II SLS (Space Launch System) rocket and Orion spacecraft, secured to the mobile launcher, is seen inside the Vehicle Assembly building as preparations continue for roll out to Launch Pad 39B, Thursday, Jan. 15, 2026, at NASA's Kennedy Space Center in Florida. (Keegan Barber/NASA via AP)
NASA's Artemis II SLS (Space Launch System) rocket and Orion spacecraft, secured to the mobile launcher, is seen inside the Vehicle Assembly building as preparations continue for roll out to Launch Pad 39B, Thursday, Jan. 15, 2026, at NASA's Kennedy Space Center in Florida. (Keegan Barber/NASA via AP)

NASA’s giant new moon rocket headed to the launch pad Saturday in preparation for astronauts’ first lunar fly-around in more than half a century.

The out-and-back trip could blast off as early as February.

The 322-foot (98-meter) rocket began its 1 mph (1.6 kph) creep from Kennedy Space Center’s Vehicle Assembly Building at daybreak. The four-mile (six-kilometer) trek was expected to take until nightfall.

Throngs of space center workers and their families gathered in the predawn chill to witness the long-awaited event, delayed for years, The Associated Press reported. They huddled together ahead of the Space Launch System rocket’s exit from the building, built in the 1960s to accommodate the Saturn V rockets that sent 24 astronauts to the moon during the Apollo program. The cheering crowd was led by NASA’s new administrator Jared Isaacman and all four astronauts assigned to the mission.

Weighing in at 11 million pounds (5 million kilograms), the Space Launch System rocket and Orion crew capsule on top made the move aboard a massive transporter that was used during the Apollo and shuttle eras. It was upgraded for the SLS rocket’s extra heft.

The first and only other SLS launch — which sent an empty Orion capsule into orbit around the moon — took place back in November 2022.

“This one feels a lot different, putting crew on the rocket and taking the crew around the moon,” NASA’s John Honeycutt said on the eve of the rocket’s rollout.

Heat shield damage and other capsule problems during the initial test flight required extensive analyses and tests, pushing back this first crew moonshot until now. The astronauts won’t orbit the moon or even land on it. That giant leap will take come on the third flight in the Artemis lineup a few years from now.

Commander Reid Wiseman, pilot Victor Glover and Christina Koch — longtime NASA astronauts with spaceflight experience — will be joined on the 10-day mission by Canadian astronaut Jeremy Hansen, a former fighter pilot awaiting his first rocket ride.

They will be the first people to fly to the moon since Apollo 17’s Gene Cernan and Harrison Schmitt closed out the triumphant lunar-landing program in 1972. Twelve astronauts strolled the lunar surface, beginning with Neil Armstrong and Buzz Aldrin in 1969.

NASA is waiting to conduct a fueling test of the SLS rocket on the pad in early February before confirming a launch date. Depending on how the demo goes, “that will ultimately lay out our path toward launch,” launch director Charlie Blackwell-Thompson said on Friday.

The space agency has only five days to launch in the first half of February before bumping into March.

Varieties

Iron Age Teeth Fossils Reveal Diet Diversity of Italians 2,500 Years Ago

The fresco on the wall of a house in Pompeii that dates back 2,000 years (AFP)
The fresco on the wall of a house in Pompeii that dates back 2,000 years (AFP)
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Iron Age Teeth Fossils Reveal Diet Diversity of Italians 2,500 Years Ago

The fresco on the wall of a house in Pompeii that dates back 2,000 years (AFP)
The fresco on the wall of a house in Pompeii that dates back 2,000 years (AFP)

Italians began exploring a varied diet sometime between the 7th and 6th centuries BC, according to a new analysis of ancient teeth from Iron Age Italians.

Unravelling details about the lifestyles of ancient cultures is a challenging task, as it requires specific, well-preserved fossils of long-deceased individuals, The Independent reported.

Fossil human teeth are an excellent resource to understand ancient diets, acting as archives of each individual’s life history.

However, collecting information from teeth across different eras remains a challenge.

In the new study, researchers combined multiple analyses of teeth remains from the Italian archaeological site of Pontocagnano to interpret the health and diet of people in the region during the 7th and 6th centuries BC.

Scientists assessed the dental tissue of 30 teeth from 10 individuals, obtaining data from canine and molar teeth to reconstruct each ancient person’s history during the first six years of their lives.

Researchers found that the Iron Age Italians had a diet rich in cereals, legumes, abundant carbohydrates, and even fermented foods and drinks.

“We could follow childhood growth and health with remarkable precision and identify traces of cereals, legumes, and fermented foods in adulthood, revealing how this community adapted to environmental and social challenges,” said Roberto Germano, an author of the study.

Emanuela Cristiani, another author of the study said, “In the case of Pontocagnano, the analysis of dental calculus revealed starch granules from cereals and legumes, yeast spores, and plant fibres, providing a very concrete picture of the diet and some daily activities of these Iron Age communities.”

The findings offer strong evidence of this ancient Italian population regularly consuming fermented foods and beverages, researchers said.

Their diets likely diversified at the time as their contact with Mediterranean cultures increased, they added.

The researchers noted that while the study may not be completely representative of the broader Italian population, it provides a “very concrete picture” of the diet and some daily activities of Iron Age communities in the Italian region.

“This and other modern approaches represent a major technological and disciplinary advancement that is revolutionizing the study of the biocultural adaptations of past populations,” said Alessia Nava, another author of the study from Sapienza University of Rome.
 

Varieties

Sharks Are Famous for Fearsome Teeth, but Ocean Acidification Could Make them Weaker

In this undated handout photo provided by Heinrich Heine University Duesseldorf in January 2026, a blacktip reef shark swims at Sealife Oberhausen in Oberhausen, Germany. (Maximilian Baum/Heinrich Heine University Duesseldorf via AP)
In this undated handout photo provided by Heinrich Heine University Duesseldorf in January 2026, a blacktip reef shark swims at Sealife Oberhausen in Oberhausen, Germany. (Maximilian Baum/Heinrich Heine University Duesseldorf via AP)
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Sharks Are Famous for Fearsome Teeth, but Ocean Acidification Could Make them Weaker

In this undated handout photo provided by Heinrich Heine University Duesseldorf in January 2026, a blacktip reef shark swims at Sealife Oberhausen in Oberhausen, Germany. (Maximilian Baum/Heinrich Heine University Duesseldorf via AP)
In this undated handout photo provided by Heinrich Heine University Duesseldorf in January 2026, a blacktip reef shark swims at Sealife Oberhausen in Oberhausen, Germany. (Maximilian Baum/Heinrich Heine University Duesseldorf via AP)

Sharks are the most feared predators in the sea, and their survival hinges on fearsome teeth that regrow throughout their lives. But changes in the ocean's chemistry could put those weapons at risk.

That is the takeaway from a study performed by a group of German scientists who tested the effects of a more acidic ocean on sharks' teeth. Scientists have linked human activities including the burning of coal, oil and gas to the ongoing acidification of the ocean, The Associated Press reported.

As oceans become increasingly acidic, sharks' teeth could become structurally weaker and more likely to break, the scientists found. That could change the big fishes' status at the top of the ocean's food chain, they wrote.

The ocean will not become populated with toothless sharks overnight, said the study's lead author, Maximilian Baum, a marine biologist at Heinrich Heine University Düsseldorf. But the possibility of weaker teeth is a new hazard to sharks that already face pollution, overfishing, climate change and other threats, Baum said.

“We found there is a corrosion effect on sharks' teeth,” Baum said. “Their whole ecological success in the ocean as the rulers of other populations could be in danger.”

The researchers, who published their work in the journal Frontiers in Marine Science, performed their study as ocean acidification has become an increasing focus of conservation scientists.

Acidification occurs when oceans absorb more carbon dioxide from the air, the National Oceanic and Atmospheric Administration has said. The ocean is expected to become almost 10 times more acidic than it currently is by the year 2300, the German scientists wrote.

The scientists performed their study by collecting more than 600 discarded teeth from an aquarium that houses blacktip reef sharks, a species of shark that lives in the Pacific and Indian oceans and typically grows to about 5.5 feet (1.7 meters) long. They then exposed the teeth to water with the acidity of today and the projected acidity of 2300.

The teeth exposed to the more acidic water became much more damaged, with cracks and holes, root corrosion and degradation to the structure of the tooth itself, the scientists wrote.

The results “show that ocean acidification will have significant effects on the morphological properties of teeth,” the scientists wrote.

Still the ocean's top predator Shark teeth are “highly developed weapons built for cutting flesh, not resisting ocean acid,” Baum said. Sharks will go through thousands of teeth in a lifetime, and the teeth are critical for allowing sharks to regulate populations of fish and marine mammals in the oceans.

Many sharks are also facing extinction jeopardy, as more than a third of shark species are currently threatened with extinction according to the International Union for Conservation of Nature. Thankfully, sharks have a number of factors that can help them stave off the negative effects of ocean acidification, said Nick Whitney, senior scientist at the Anderson Cabot Center for Ocean Life at the New England Aquarium.

Whitney, who was not involved in the study, said the scientists' work on the shark teeth was sound. However, because shark teeth develop inside the mouth tissue of sharks, they will be shielded from changes in ocean chemistry for a time, he said.

And history has taught us that sharks are survivors, Whitney said.

“They've been around for 400 million years and have evolved and adapted to all kinds of changing conditions,” he said.

Ocean acidification could be a concern, but overfishing remains the biggest threat to sharks, said Gavin Naylor, director of the Florida Program for Shark Research at the Florida Museum of Natural History.

Acidification will bring many changes Naylor and others cautioned that ocean acidification is indeed going to pose many threats to the ocean beyond just sharks. Ocean acidification is expected to be especially harmful to shellfish such as oysters and clams because it will make it more difficult for them to build shells, NOAA has said.

It could also make fish scales weaker and more brittle. It's tough to say now whether that could ultimately benefit the sharks that feed on them, Naylor said.

For now, ocean acidification can't be disregarded as a threat facing sharks, Baum said. Some shark species could come close to extinction in the coming years and ocean acidification could be one of the factors causing that to happen, he said.

“The evolutionary success of sharks is dependent on their perfectly developed teeth,” Baum said.