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

About 6% of mountain lion deaths between 2005 and 2014 were due to the plague, according to new research.

The Plague Has Been Quietly Killing Yellowstone Cougars for a Decade

Researchers found that almost half of the mountain lions they tested showed signs of plague infection

Patrick Stewart attends the 90th Annual Academy Awards.

Hear Daily Shakespeare Sonnets Recited by Patrick Stewart

The classically trained actor is reading a sonnet a day on Instagram

A person holds a sewn handmade fabric mask.

What Experts Know About Masks and COVID-19

The CDC recommends wearing a fabric mask in public where social distancing is difficult, like at the grocery store

A selection of classic books available on Audible Stories

Listen to Hundreds of Free Audiobooks, From Classics to Educational Texts

Audible's new service is aimed at school-age children participating in distance learning but features selections likely to appeal to all

Google searches for terms like "sourdough," "bread recipe" and "banana bread" skyrocketed in the middle of March.

The World's Oldest Leavened Bread Is Rising Again

This is the story behind the breads you might be baking in lockdown

Come to Your Census began as a campaign of events and posters like this one, featuring artwork by Emory Douglas.

This Art Campaign Wants You to Participate in the 2020 Census

Due to COVID-19, Art + Action's "Come to Your Census" project has pivoted from posters and events to social media and online outreach

A sample of calcium copper silicate, also called Egyptian blue because it was invented roughly 5,000 years ago at the end of ancient Egypt's first dynasty.

New Tool for Biomedical Research Was Invented in Ancient Egypt

The bright blue pigment that adorns the Bust of Nefertiti’s crown can now be used to study molecular biology

More than 300 (and counting) universities, libraries and individuals in related fields have signed a statement in support of the National Emergency Library.

Why the National Emergency Library Is So Controversial

The Internet Archive describes the downloadable collection of more than one million books as a library, but critics call it piracy

New research suggests that the impact that shaped Pluto's heart may have caused destruction on the other side.

More Evidence That Pluto Might Have a Subsurface Ocean

The impact that created Pluto’s 'heart' may have rippled through its ocean and damaged its rear

In March 2018, brothers Griffin, left, and Maxwell Bean of Berwick stand at the edge of Short Sands Beach on Tuesday for a rare glimpse of a shipwrecked sloop that emerged from the sand during recent heavy surf.

Maine Shipwreck Identified as Colonial-Era Cargo Vessel

Storms reveal, then hide, the ship's sand-covered remains every decade or so

Poenari Castle was once the clifftop fortress of Vlad the Impaler.

Watch Seven Medieval Castles' Digital Reconstruction

Architects and designers restored royal ruins across Europe to their former glory

The supermoon in March, called a Worm Moon, was the first of three supermoons in a row.

April’s Super 'Pink' Moon Will Be the Brightest Full Moon of 2020

Despite the name, moon won’t have a rosy hue. The name alludes to flowers that bloom in April

The Smithsonian's National Portrait Gallery offers a free audio tour of its presidential portraits.

Explore World-Class Museums From Home With Smartify's Free Audio Tours

The app features a database of some two million artworks housed at more than 120 venues

According to traditional Japanese folklore, Amabie predicts good harvests and protect against disease.

Amid Pandemic, Artists Invoke Japanese Spirit Said to Protect Against Disease

Illustrators are sharing artwork of Amabie, a spirit first popularized during the Edo period, on social media

Hayabusa2 deployed a camera to film the plume of regolith thrown up by the impact.

Japan's Experiment to Calculate an Asteroid's Age Was a Smashing Success

The spacecraft Hayabusa2 hurled a four-pound copper ball toward the asteroid's surface at about 4,500 miles an hour to create an artificial crater

Archival image, July 9, 1973: (Original caption) A woman seems hesitant about buying fish at a shop in Tokyo recently (June 25) after the Japanese Health and Welfare Ministry's June 24th warning that no one should eat more than 567 grams (about one pound four ounces) of fish a week to avoid the possibility of dangerous mercury poisoning.

A Dead Cat's Brain Revives Discussion of 1960s Mercury Poisoning Disaster in Japan

The exact molecule behind the Minamata mercury disaster, caused by a chemical plant’s wastewater, remains a point of disagreement

The Baldwins' home was reconstructed in 1966 and is now a museum showcasing the missionary's life in the mid-1800s.

Archaeologists Unearth Remnants of Kitchen Behind Oldest House Still Standing in Maui

The missionary who lived in the house during the mid-1800s delivered vaccinations to locals during a smallpox epidemic

Sara Cartelli fills bottles with a hand sanitizer at the Claremont Distillery during the coronavirus pandemic on March 20, 2020 in Fairfield, New Jersey. Distillery owner Tim Koether will offer it to the general public for free.

Distilleries Around the U.S. Shift Production to Hand Sanitizer

Some distilleries are donating their new product to local communities in need

The top of Zagreb Cathedral's southern spire toppled during Sunday's earthquake.

5.4-Magnitude Earthquake Damages Zagreb Cathedral, Museums

The tremors, which arrived in the midst of the COVID-19 pandemic, was the worst the Croatian capital has seen in 140 years

Western monarch butterflies spend winter gathered in California's coastal groves.

Your Butterfly Photos Could Help Monarch Conservation

As monarchs leave their winter hideaways, conservationists are seeking assistance in studying their migration routes

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