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Stories from Sarah Kuta

Adult emperor penguins have waterproof feathers. But they replace all of them every year during their catastrophic molt, which makes them vulnerable.

As Their Antarctic Habitat Melts Away, Emperor Penguins Are Now Considered an Endangered Species

The International Union for Conservation of Nature predicts that the birds’ population could be cut in half by the 2080s. The organization also changed the statuses of Antarctic fur seals and southern elephant seals

The original Shroud of Turin is housed at the Cathedral of St. John the Baptist in Turin, Italy, but replicas like the one shown here have been created for exhibitions and public displays.

Jesus’s Burial Cloth or Medieval Forgery? DNA Evidence Further Complicates the Debate Over the Shroud of Turin

A new analysis revealed traces of various plants, animals and humans on the controversial linen cloth. But outside experts are skeptical of the findings, which could complicate efforts to identify the shroud’s original wearer

This rendering shows what a polybolos might have looked like aimed at Pompeii's northern city walls.

Long Before Machine Guns, Ancient Roman Troops Used This 2,000-Year-Old Rapid-Fire Weapon in Pompeii, New Research Suggests

Ancient Roman forces may have used the polybolos to quell a rebellion at Pompeii in 89 B.C.E. The unique weapon was likely developed by a Greek engineer centuries earlier

Divers have recovered 1,200 artifacts from the site.

See the 2,000-Year-Old Ancient Roman Cargo From an Accidental Shipwreck Discovered at the Bottom of a Lake in Switzerland

Divers recovered weapons, tools, pieces of horse-drawn chariots, ceramic plates, platters and goblets. One archaeologist surmises that the loss would have been “immense” at the time

Cow sharks (one shown) and frilled sharks are members of the newly proposed lineage.

What Is a Shark? A New Genetic Analysis Throws an ‘Unexpected Wrench’ Into Our Understanding of the Ocean Predators

Some shark species might belong to their own distinct lineage, which is separate from all other sharks, rays and skates, according to a new study

Becoming an expert birder might support brain health, according to a new study.

Becoming an Expert Birder Can Reshape Your Brain and Might Help Protect It From Aging, New Research Suggests

Compared with novices, seasoned birders had denser, more structurally complex brain regions involved with tasks like object identification, visual processing, attention and working memory

Now part of Dry Tortugas National Park, Fort Jefferson was built starting in 1846.

This Soldier Died of Yellow Fever During a Hurricane 153 Years Ago. Archaeologists Just Found His Grave

George Tupper, a 22-year-old from Massachusetts, was nearly a year into his military service when a yellow fever outbreak struck Fort Jefferson

The last documented thylacine died at a zoo in Hobart in 1936, but people have reported hundreds of sightings of the extinct creature since then.

Rock Art Suggests the Tasmanian Tiger May Have Survived on Mainland Australia Longer Than Previously Thought

Archaeologists think some of the paintings may be less than 1,000 years old, even though the animals were thought to have disappeared from the continent roughly 3,000 years ago

Domino the warty frogfish is about the size of a pea.

Meet Domino, a Tiny, Bumpy Fish Making a Splash in Chicago

The warty frogfish, also known as a clown anglerfish, is believed to be the first of its kind born and raised in captivity

Restorers are touching up the wood panel painting in full view of the public.

Experts Are Carefully Restoring a 15th-Century Masterpiece by Giovanni Bellini—and You Can Watch Them Work

The two-year project is expected to cost around $580,000, and visitors to the Gallerie dell’Accademia in Venice will be able to observe the process in person

Bruce Jayne, a biologist at the University of Cincinnati, co-authored the new paper, which examined the locomotive abilities of three brown tree snakes (like the one pictured here) and a scrub python.

How Do Snakes ‘Stand’ Upright Nearly Stick-Straight? New Research Points to How They Pull Off the Gravity-Defying Feat

These clever creatures seem to concentrate their muscle activity near their bases, which helps them cross gaps between tree branches in the wild

Two researchers wore goggles, snorkels and wet suits while exploring the underground stream.

These Snorkeling Scientists Stumbled Upon a Surprising Trove of Fossils in a Texas Water Cave

They found remains of animals that have never been uncovered in Central Texas. The fossils hint that the region was warm, moist and forested 100,000 years ago

Researchers gathered bark from two species of trees—downy birch and silver birch—on public land in Germany. Then, they used it to produce birch tar via three extraction techniques.

Did Neanderthals Use Birch Bark Tar as an Antibiotic to Treat Wounds and Infections?

Scientists created samples of the black resin using three methods and tested their effectiveness against two common bacteria

Pinot noir grapes in Verzenay, France

Scientists Say This 600-Year-Old Grape Seed Is ‘Genetically Identical’ to Modern Varieties Used to Make Pinot Noir

Researchers analyzed grape seeds dating to between 2300 B.C.E. and 1500 C.E., including one particularly intriguing sample found in the toilet of a medieval hospital in France

The perception of sleep is just as important as the quality of sleep.

Vivid Dreams Might Be Key to Feeling Well Rested When You Wake Up, According to a New Study

The findings could help explain the purpose of dreams and help physicians better treat people with sleep disorders

Library of Congress conservator Heather Wanser works on the Yosemite drawing created by Thomas Almond Ayres in 1855.

See the Stunning 171-Year-Old Sketch That Helped Put Yosemite on the Map

The Library of Congress has acquired a drawing and accompanying lithograph of Yosemite Falls created by Gold Rush-era artist Thomas Almond Ayres in 1855

The intact cannonball weighs four pounds.

Archaeologists Discover an Intact Cannonball From the Battle of the Alamo—One Day Before the Pivotal Conflict’s 190th Anniversary

The projectile is made of bronze, which suggests it was fired by the Mexican Army during the siege leading up to the 1836 battle

Touch screens can be a challenge for users with long fingernails.

A New Nail Polish Might Someday Solve Touch Screen Struggles for Users With Long Fingernails

The experimental coating could effectively transform fingernails into touch screen-compatible styluses

Archaeologists have discovered at least five seated burials in Dijon, France.

Archaeologists Are Mystified by These 2,000-Year-Old Bodies Found Seated Upright and Facing West in France

Researchers previously discovered 13 sets of human remains buried in a similar manner at the same grave site in Dijon

Researchers recently discovered that platypuses are the only known mammals with hollow melanosomes, a pigment-filled structure that gives hair, fur, skin, feathers and eyes their color. 

Platypus Hair Shares a Puzzling Feature With Bird Feathers, Adding to the Egg-Laying Mammal’s List of Unusual Characteristics

The species’ melanosomes—tiny, pigment-filled structures inside hair cells—are hollow, a trait never before seen in mammals

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