illustration of the Lodge at Los Alamos on a sheet of stationary

Life on ‘The Mesa’

The Manhattan Project forged a city in the desert at Los Alamos.

ByPatrick H. SheaMarch 7, 2024

For two years beginning in the spring of 1943, many of the world’s brightest physicists, chemists, and engineers participated in an intense government program to create the world’s first atomic weapons. In complete secrecy, this cadre of elite scientists converged on a small, remote mesa in Los Alamos, New Mexico. They theorized about the inner workings of the atom, devised novel ways to split them, and in the process, constructed the deadliest weapons in human history.

Robert Oppenheimer on the cover of Life magazine
J. Robert Oppenheimer on the cover of Life magazine, October 10, 1949.

Inhabitants of the site spent their days engaged in both cutting-edge science and moral discussions about life and death, but for the most part, life continued at Los Alamos as if it were any other American town. The people worked hard, played hard, fell in love, and in a great many cases started families. In the words of journalist Ellen Newman, life at Los Alamos during the war was “part summer camp, part science fair, and part college campus under lockdown.” 

Located on the eastern slope of the Jemez Mountains on the Pajarito Plateau, Los Alamos is as beautiful as it is remote. The site was selected by J. Robert Oppenheimer to centralize the research being conducted around the country on the Manhattan Project. The remoteness of the area appealed to military planners, but it was the beauty of the surrounding landscape that Oppenheimer used to recruit his select team of scientists. Ruth Marshak, wife of physicist Robert Marshak, described her first impressions of the area:

As we neared the top of the mesa, the view was breathtaking. Behind us lay the Sangre de Cristo Mountains, at sunset bathed in changing waves of color—scarlets and lavenders. Below was the desert with its flatness broken by majestic palisades that seemed like the ruined cathedrals and palaces of some old, great, vanished race. Ahead was Los Alamos, and beyond the flat plateau on which it sat was its backdrop, the Jemez Mountain Range. Whenever things went wrong at Los Alamos . . . we had this one consolation—we had a view.

The remoteness of the area meant that an entire city would need to be built from scratch, including houses, schools, stores, a post office, a hospital, a fire department, and a power plant. Doctors, veterinarians, garbage collectors, and countless other specialists would also need to be recruited for the site to function efficiently. Almost overnight, Los Alamos had become a boomtown. In many ways, the construction of Los Alamos was like that of any of the other single-industry company towns scattered across the U.S., particularly those in the mining and timber industries. But at Los Alamos, the industry was atomic weapons.

black and white photo of a group of people
Photo of the Radiochemistry Group at Los Alamos, from the Richard W. Dodson Papers, ca. 1945.

By 1943 scientists and their families, along with the most sophisticated scientific equipment of the day, arrived from all parts of the United States and Europe. Staff included the best and brightest of the scientific community, including Enrico Fermi, Hans Bethe, Richard Feynman, John von Neumann, Emilio Segrè, Edward Teller, and others. Many of the Los Alamos scientists were already leaders in their fields and had contributed to the very foundations of modern physics and quantum mechanics. Several had won Nobel Prizes before the Manhattan Project; many others would win in the decades that followed.

Married scientists were permitted to bring their families to the site, a fact that proved key in the recruitment process. Others were fresh out of graduate school, single, and eager to start a family. At its height, there were approximately 640 women working at the secret city, about 11 percent of the total work force. Some were the spouses of scientists, but nearly half were scientists and mathematicians in their own right.

For those working on the project, the stakes were unbelievably high. A typical work week was 12–14 hours a day, six days a week. But on Saturday night, they let loose. Several events were usually scheduled for every Saturday evening, and these events, fueled by large quantities of alcohol, soon became an integral part of life in Los Alamos.

black and white photo of a group of people in the snow in the woods
Enrico Fermi (far left) and Hans Bethe (standing center) are pictured with an unidentified group on a Los Alamos ski trip. Undated photo by Emilio Segrè.

Scientists and their families also relaxed by participating in a variety of camp-like activities such as hiking, skiing, and horseback riding through the mountains. Teller cleverly described life at Los Alamos as “a wilderness reserve for physicists.” The theater and square-dancing clubs were also popular and hosted frequent events in Fuller Lodge, a three-story log structure that served as the heart of the Los Alamos community. The lodge was also home to the Keynotes, the project’s very own orchestra. 

The secret nature of their work coupled with their isolation from the rest of the world created a strong sense of community among the site’s inhabitants. Many lifelong friendships were made there and many new romantic relationships were formed. Almost from the very beginning, the military hospital at Los Alamos became notable for its high birth rate, which greatly exceeded that of any other military hospital in the country. This fact caught military planners off guard, as the local hospital had been equipped to provide care for industrial accidents, not pregnancies.

portrait of Robert Oppenheimer
Portrait of J. Robert Oppenheimer at the Guest House, Oak Ridge, Tennessee, 1946. Photo by Ed Westcott DOE.

By 1944 medical director Stafford Warren wrote to General Leslie Groves, the head of the Manhattan Project, stating, “Approximately one-fifth of the married women are now in some stage of pregnancy.” In total, 80 babies were born in the first year at Los Alamos. By war’s end, that number exceeded 200, and by 1949 over 1,000 babies were born at the site.

Groves was not at all pleased with the extracurricular activities of the staff and insisted Oppenheimer take steps to stop the “baby boom.” Oppenheimer, however, did not feel that population control was part of his job description and declined to do anything. Moreover, Oppenheimer’s wife Kitty was pregnant at the time. Grove’s complaint soon spread across the community and as a result, a limerick grew in popularity among the staff:

The General’s in a stew.
He trusted you and you and you.
He’d thought you’d be scientific.
Instead, you’re just prolific.
And what is he to do?

Since the town of Los Alamos did not officially exist, everyone born at the site had “Post Office Box 1663” listed as the place of birth on their birth certificate. By war’s end, in a unique historical quirk of the time, over 200 babies had officially been born in a post office box.

old typed letter
Memo from J. Robert Oppenheimer to members of the Los Alamos Laboratory stressing the need to maintain secrecy about the Manhattan Project despite the public announcement of its existence, from the Richard W. Dodson Papers.

In the years since, countless biographies and memoirs have been published that recount life at Los Alamos during the Manhattan Project. It was a time of intense academic research and development with literal life and death consequences, but for most, life simply went on and the residents of Los Alamos made every attempt to enjoy it to its fullest.

Today the site operates as the Los Alamos National Laboratory, but to the many scientists and engineers who lived there during World War II, it was called “The Mesa.” In military jargon, it was known as “Site Y,” and affectionately, many of its inhabitants referred to it as “Shangri-La,” a mythical mountain utopia isolated from the rest of the world.

cover of US Atomic Energy Commission report
In the Matter of J. Robert Oppenheimer, report from the United States Atomic Energy Commission, 1954.

The Science History Institute holds the papers of two Manhattan Project scientists­­: Spofford Grady English and Richard W. Dodson. While English worked on the project as part of Glenn Seaborg’s group at the University of Chicago Metallurgical Laboratory, Dodson lived at the secret Los Alamos site, and his collection offers a glimpse into the normal lives playing out in the most unusual circumstances.

If you are interested in viewing the Institute’s collections related to Los Alamos and the Manhattan Project, we invite you to our library open house on April 10,  which will feature the items pictured above, alongside a variety of items related to the suspension of Oppenheimer’s security clearance in 1954.

Featured image: The Lodge at Los Alamos as pictured on a sheet of stationary, from the Richard W. Dodson Papers, Science History Institute.

More from our collections blog

Oral history bound copies, recorder, microphone
Collections Blog

Stories Untold

Why oral history is critical for the history of science and engineering.

Collections Blog

The Life and Times of CHEMS

A chemistry curriculum with bonds beyond the molecule.

Origami paper crane made by Yoichiro Ito
Collections Blog

Lost Stories and Missed Opportunities

What we can no longer learn from Yoichiro Ito.


    Copy the above HTML to republish this content. We have formatted the material to follow our guidelines, which include our credit requirements. Please review our full list of guidelines for more information. By republishing this content, you agree to our republication requirements.