عربي English Türkçe اردو فارسى
Logo
Latest News
Varieties

Human Saliva Has Potential to Evolve Into Venom

Snakes hang from a wooden cabinet marked with the Chinese characters "poisonous snake", at a snake soup shop ahead of the Spring Festival in Hong Kong. Photo: Reuters
Snakes hang from a wooden cabinet marked with the Chinese characters "poisonous snake", at a snake soup shop ahead of the Spring Festival in Hong Kong. Photo: Reuters
TT
TT

Human Saliva Has Potential to Evolve Into Venom

Snakes hang from a wooden cabinet marked with the Chinese characters "poisonous snake", at a snake soup shop ahead of the Spring Festival in Hong Kong. Photo: Reuters
Snakes hang from a wooden cabinet marked with the Chinese characters "poisonous snake", at a snake soup shop ahead of the Spring Festival in Hong Kong. Photo: Reuters

Humans have the potential to become venomous due the genetic similarities between our saliva glands and a snake's venom glands, say scientists.

A joint research team from Japan's Okinawa Institute of Science and Technology Graduate University (OIST) and the Australian National University, found that the genetic foundation required for oral venom to evolve is present in both reptiles and mammals.

Reporting this in the journal PNAS on April 6, the researchers provided the first concrete evidence of an underlying molecular link between venom glands in snakes and salivary glands in mammals.

Venoms are a cocktail of proteins that animals have weaponized to immobilize and kill prey, as well as for self-defense. What's interesting about venom is that it has arisen in so many different animals: jellyfish, spiders, scorpions, snakes, and even some mammals. Although these animals evolved different ways to deliver venom, an oral system, where venom is injected through a bite is one of the most common.

In the study, the team looked at the genes that played important roles in protecting the cells from stress caused by producing lots of proteins. The genes were also key in regulating protein modification and folding. The scientists used venom glands collected from the Taiwan habu snake, a pit viper found in Asia.

The researchers identified around 3,000 of these 'cooperating' genes. Then, they studied the genomes of other creatures across the animal kingdom, including mammals like dogs, chimpanzees and humans, and found that they contained their own versions of these genes.

When the team looked at the salivary gland tissues within mammals, they found that the genes had a similar pattern of activity to that seen in snake venom glands. The scientists therefore think that salivary glands in mammals and venom glands in snakes share an ancient functional core that has been maintained since the two lineages split hundreds of millions of years ago.

Most Viewed

 
 
Varieties

Nine Skiers Missing, Six Rescued after California Avalanche

FILE PHOTO: The snow-covered Sierra Nevada Mountains are seen from the air during a Pacific Gas and Electric snowpack survey near Nevada City, California, US April 3, 2017. REUTERS/Bob Strong/File Photo
FILE PHOTO: The snow-covered Sierra Nevada Mountains are seen from the air during a Pacific Gas and Electric snowpack survey near Nevada City, California, US April 3, 2017. REUTERS/Bob Strong/File Photo
TT
TT

Nine Skiers Missing, Six Rescued after California Avalanche

FILE PHOTO: The snow-covered Sierra Nevada Mountains are seen from the air during a Pacific Gas and Electric snowpack survey near Nevada City, California, US April 3, 2017. REUTERS/Bob Strong/File Photo
FILE PHOTO: The snow-covered Sierra Nevada Mountains are seen from the air during a Pacific Gas and Electric snowpack survey near Nevada City, California, US April 3, 2017. REUTERS/Bob Strong/File Photo

Nine skiers were missing after an avalanche in California's Sierra Nevada mountains on Tuesday, but six others, who had been stranded, have since been rescued, authorities said.

The avalanche swept the Castle Peak area of Truckee, California, about 10 miles north of Lake Tahoe, at about 11:30 a.m. Pacific time, engulfing a group of skiers, according to a Facebook statement posted by the Nevada County Sheriff's Office.

Those rescued have varying injuries and two were ‌sent to a hospital ‌for treatment.

The sheriff's office revised the number of ‌people ⁠in the group to ⁠15 from an earlier estimate of 16, adding that no further updates were expected on Tuesday evening.

If all nine of the missing skiers should perish, the incident would rank among the deadliest single avalanches on record in the United States. The Colorado Avalanche Information Center has tallied six US avalanche fatalities so far this season.

Avalanches have claimed an average of 27 lives ⁠each winter in the United States over the past ‌decade, the center reported.

A winter storm warning ‌was in effect for much of northern California on Tuesday, with heavy snow ‌forecast in the upper elevations of the Sierra Nevada.

The Sierra Avalanche Center ‌had posted an alert before dawn on Tuesday, warning of a "high avalanche danger" in the ski region, the sheriff's statement said.

"I don't think it was a wise choice," Greene said of the decision of a ski tour company to take paying ‌customers out into the backcountry under such conditions, adding, "but we don't know all the details yet." He declined to ⁠name the company involved.

Rescue ⁠ski teams were dispatched to the avalanche zone from the Boreal Mountain Ski Resort and Tahoe Donner's Alder Creek Adventure Center.

The survivors had taken refuge in a makeshift shelter, constructed partly from tarpaulin sheets and communicated with rescuers via radio beacon and text messaging.

Greene declined to say how many of the ski guides and how many of their customers were among the missing.

Weather conditions remained hazardous in the Sierra backcountry slopes, with additional avalanche activity expected through Tuesday night and into Wednesday, according to the sheriff's statement.

California Governor Gavin Newsom was briefed on the avalanche, and state authorities were "coordinating an all-hands search-and-rescue effort" in conjunction with local emergency teams, his office said in a posting on X.

Varieties

Surprise Shark Caught on Camera for 1st Time in Antarctica’s Near-freezing Deep

In this image made from video and released by the University of Western Australia, a sleeper shark swims into the spotlight of a video camera in Antarctica in January 2025. (Minderoo-UWA Deep-Sea Research Centre, Inkfish, Kelpie Geoscience via AP)
In this image made from video and released by the University of Western Australia, a sleeper shark swims into the spotlight of a video camera in Antarctica in January 2025. (Minderoo-UWA Deep-Sea Research Centre, Inkfish, Kelpie Geoscience via AP)
TT
TT

Surprise Shark Caught on Camera for 1st Time in Antarctica’s Near-freezing Deep

In this image made from video and released by the University of Western Australia, a sleeper shark swims into the spotlight of a video camera in Antarctica in January 2025. (Minderoo-UWA Deep-Sea Research Centre, Inkfish, Kelpie Geoscience via AP)
In this image made from video and released by the University of Western Australia, a sleeper shark swims into the spotlight of a video camera in Antarctica in January 2025. (Minderoo-UWA Deep-Sea Research Centre, Inkfish, Kelpie Geoscience via AP)

An ungainly barrel of a shark cruising languidly over a barren seabed far too deep for the sun’s rays to illuminate was an unexpected sight.

Many experts had thought sharks didn’t exist in the frigid waters of Antarctica before this sleeper shark lumbered warily and briefly into the spotlight of a video camera, researcher Alan Jamieson said this week. The shark, filmed in January 2025, was a substantial specimen with an estimated length of between 3 and 4 meters (10 and 13 feet).

“We went down there not expecting to see sharks because there’s a general rule of thumb that you don’t get sharks in Antarctica,” Jamieson said.

“And it’s not even a little one either. It’s a hunk of a shark. These things are tanks,” he added.

The camera operated by the Minderoo-UWA Deep-Sea Research Centre, which investigates life in the deepest parts of the world’s oceans, was positioned off the South Shetland Islands near the Antarctic Peninsula. That is well inside the boundaries of the Antarctic Ocean, also known as the Southern Ocean, which is defined as below the 60-degree south latitude line.

The center on Wednesday gave The Associated Press permission to publish the images.
The shark was 490 meters (1,608 feet) deep where the water temperature was a near-freezing 1.27 degrees Celsius (34.29 degrees Fahrenheit).

A skate appears in frame motionless on the seabed and seemingly unperturbed by the passing shark. The skate, a shark relative that looks like a stingray, was no surprise since scientists already knew their range extended that far south.

Jamieson, who is the founding director of the University of Western Australia-based research center, said he could find no record of another shark found in the Antarctic Ocean.

Peter Kyne, a Charles Darwin University conservation biologist independent of the research center, agreed that a shark had never before been recorded so far south.

Climate change and warming oceans could potentially be driving sharks to the Southern Hemisphere’s colder waters, but there was limited data on range changes near Antarctica because of the region’s remoteness, Kyne said.

The slow-moving sleeper sharks could have long been in Antarctica without anyone noticing, he said.

“This is great. The shark was in the right place, the camera was in the right place and they got this great footage,” Kyne said. “It’s quite significant.”

The sleeper shark population in the Antarctic Ocean was likely sparse and difficult for humans to detect, Jamieson said.

The photographed shark was maintaining a depth of around 500 meters (1,640 feet) along a seabed that sloped into much deeper water. The shark maintained that depth because that was the warmest layer of several water layers stacked upon each other to the surface, Jamieson said.

The Antarctic Ocean is heavily layered, or stratified, to a depth of around 1,000 meters (3,280 feet) because of conflicting properties including colder, denser water from below not readily mixing with fresh water running off melting ice from above.

Jamieson expects other Antarctic sharks live at the same depth, feeding on the carcasses of whales, giant squids and other marine creatures that die and sink to the bottom.

There are few research cameras positioned at that specific depth in Antarctic waters.

Those that are can only operate during the Southern Hemisphere summer months, from December through February.

“The other 75% of the year, no one’s looking at all. And so this is why, I think, we occasionally come across these surprises,” Jamieson said.

Varieties

17th Century Wreck Reappears from Stockholm Deep

The remains of a 17th century shipwreck is pictured after resurfacing in Stockholm, Sweden, on February 17, 2026. (Photo by Jonathan NACKSTRAND / AFP)
The remains of a 17th century shipwreck is pictured after resurfacing in Stockholm, Sweden, on February 17, 2026. (Photo by Jonathan NACKSTRAND / AFP)
TT
TT

17th Century Wreck Reappears from Stockholm Deep

The remains of a 17th century shipwreck is pictured after resurfacing in Stockholm, Sweden, on February 17, 2026. (Photo by Jonathan NACKSTRAND / AFP)
The remains of a 17th century shipwreck is pictured after resurfacing in Stockholm, Sweden, on February 17, 2026. (Photo by Jonathan NACKSTRAND / AFP)

A 17th century Swedish Navy shipwreck buried underwater in central Stockholm for 400 years has suddenly become visible due to unusually low Baltic Sea levels.

The wooden planks of the ship's well-preserved hull have since early February been peeking out above the surface of the water off the island of Kastellholmen, providing a clear picture of its skeleton.

"We have a shipwreck here, which was sunk on purpose by the Swedish Navy," Jim Hansson, a marine archeologist at Stockholm's Vrak - Museum of Wrecks, told AFP.

Hansson said experts believe that after serving in the navy, the ship was sunk around 1640 to use as a foundation for a new bridge to the island of Kastellholmen.

Archeologists have yet to identify the exact ship, as it is one of five similar wrecks lined up in the same area to form the bridge, all dating from the late 16th and early 17th centuries.

"This is a solution, instead of using new wood you can use the hull itself, which is oak" to build the bridge, Hansson said.

"We don't have shipworm here in the Baltic that eats the wood, so it lasts, as you see, for 400 years," he said, standing in front of the wreck.

Parts of the ship had already broken the surface in 2013, but never before has it been as visible as it is now, as the waters of the Baltic Sea reach their lowest level in about 100 years, according to the archaeologist.

"There has been a really long period of high pressure here around our area in the Nordics. So the water from the Baltic has been pushed out to the North Sea and the Atlantic," Hansson explained.

A research program dubbed "the Lost Navy" is underway to identify and precisely date the large number of Swedish naval shipwrecks lying on the bottom of the Baltic.