Theresa Machemer

Theresa Machemer is a freelance writer based in Washington DC. Her work has also appeared in National Geographic and SciShow. Website: tkmach.com

Archaeologists first spotted the sturgeon's bony plates near a barrel in the Gribshunden shipwreck.

Well-Preserved Atlantic Sturgeon Found in 15th-Century Danish Shipwreck

The fish's remains were stored in a barrel in the royal vessel's pantry

The 1,100-year-old sword found in Norway measures about three feet long.

Norwegian Archaeologists Unearth Grave of Left-Handed Viking Warrior

Vikings' weapons were often buried on the opposite side of where their owners had held them in life, pointing toward belief in a "mirror afterlife"

Green lasers pointed at a plastic mannequin head wearing a face shield show how the droplets from a cough or sneeze escape around the sides.

Face Shields and Valved Masks Don't Fully Stop the Spread of Aerosols

A new visualization shows how droplets from a cough or sneeze escape around the sides of a plastic face shield

“Wise and Valiant: Women and Writing in the Golden Age of Spain” spotlights Sor Juana Inés de la Cruz (left) and Catalina de Erauso (right), among others.

Remembering the Forgotten Women Writers of 17th-Century Spain

A show in Madrid highlights female authors who penned histories, biographies, poetry, novels, scripts and more

The statues have stood outside of the Shelbourne Hotel since 1867.

Dublin Hotel Controversially Removes Four Statues of African Women

City officials say the Shelbourne, which moved the sculptures because it believed they depicted enslaved women, failed to follow proper procedures

Polish explorers check a footage from a remote-operated vehicle deep in the Czech Republic's deepest cave.

World’s Deepest Freshwater Cave Is Twice as Deep as Previously Thought

New research shows the Hranice Abyss in the Czech Republic is 3,280 feet deep

A scale model of Stonehenge used to test the ancient monument's acoustics

Scientists Map Stonehenge's Soundscape

Study of small-scale model sheds light on how conversation, music moved through the massive monument

A miniature version of the Hampton Court hedge maze is one of the most complicated mazes the amoebas solved.

A Mini Version of Britain's Royal Hedge Maze Is No Match for Amoebas

The study demonstrates how cells navigate the human body to provide immunity or carry messages

The Große Stammbuch contains 100 illustrations dated to between 1596 and 1647. This two-page spread depicts flowers, insects and shells.

Why 'Friendship Books' Were the 17th-Century Version of Facebook

Dozens of 17th-century dignitaries signed a 227-page manuscript recently acquired by a German library

This embryonic sauropod perished after about four-fifths of its development in an egg.

Why This 'Unicorn Baby Dinosaur' Is the 'Cutest,' 'Weirdest' Ever

The tiny sauropod had a horn on its snout and forward-facing eyes, unlike its adult counterparts

Speaking with BBC News, Frans Hals specialist Anna Tummers described the painting as a "wonderful example of his loose painting style. ... It was very playful, daring and loose."

Thieves Steal 17th-Century Masterpiece for Third Time in 32 Years

Frans Hals' "Two Laughing Boys with a Mug of Beer" was previously purloined in 1988 and 2011

Dark skies specialist Stephen Hummel of the University of Texas at Austin captured this rare formation at the McDonald Observatory.

How to Spot Elusive 'Jellyfish Sprites' Dancing in the Sky During a Thunderstorm

The large red flashes of light only last for milliseconds

A visitor at Belmont-Paul Women's Equality National Monument in Washington, D.C.

How the National Park Foundation Is Highlighting Women's History

The organization will allocate $460,000 toward projects at 23 parks across the country

The mushroom cloud from Tsar Bomba was 42 miles high, about seven times the height of Mount Everest

Russia Declassifies Video From 1961 of Largest Hydrogen Bomb Ever Detonated

The blast was over 3,000 times bigger than the bomb that destroyed Hiroshima

The 63 statues selected depict their subjects in eight different situations, including carrying a baby, playing music, preparing for combat and undergoing torture.

What Ancient Sculptures Reveal About Universal Facial Expressions

New research suggests displays of emotion may transcend time and culture

Wolverines make dens in snowpack to raise kits

First Wolverine Family Makes a Home in Mount Rainier National Park in 100 Years

A trio of wolverines—a mom and two kits—were spotted on camera traps in the park

L-shaped foundations of the medieval Great Sacristy, as seen from the roof of Westminster Abbey

Lost Medieval Sacristy, Burial Grounds Unearthed at Westminster Abbey

Demolished in the 1740s, the 13th-century structure once housed the church's altar linens, chalices and other sacred items

Some redwoods were still on fire on Saturday, Aug. 22, 2020 in Boulder Creek, CA.

Wildfire Burns California’s Oldest State Park—but Most Redwoods Should Recover Soon

However, the park lost its historic core infrastructure, including headquarters, amphitheater and campgrounds

Commuters wearing face masks walk to work in Tokyo on April 7.

How a Japanese Museum Is Documenting Life During Covid-19

New exhibition features everyday objects that would have been unfamiliar before the pandemic

Ten-year-old Fionntan Hughes found the sword on his first day using a new metal detector.

Using a Metal Detector, 10-Year-Old Boy Finds Centuries-Old Sword in Northern Ireland

Fionntan Hughes had just received the device for his birthday

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