Archaeologists Need Your Help to Study 100+ Graves in Philadelphia

In 1707, the First Baptist Church of Philadelphia, which was less than 10 years old, found a permanent home at a Quaker meeting house on what is now Arch Street in the Old City area. The Quakers soon moved out, but the Baptists stayed on, building new brick buildings as the congregation grew—and an adjacent cemetery to bury those who died. By 1763, the church decreed that congregants who chipped in for the building of a meeting house could be buried for one dollar. Others would have to ante up at least two dollars.

For most of the next century, that cycle of growth and death continued, until First Baptist became too large for its location and decided to move to another spot nearby. The church made an agreement with the newly chartered Mount Moriah Cemetery that in 1859, the remains of the people in its cemetery would be moved to section 112 of Mount Moriah.

But as construction workers discovered last fall, the bodies hadn't been moved. They were still literally six feet under.


As the crew from PMC Property Group broke ground on the former church site to build an apartment complex, bones began appearing. At first it was just a box full, and not all of them were human. They were also unclaimed, as Kimberlee Moran, director of forensic science at Rutgers University-Camden, read in the Philadelphia Inquirer. The paper reported that local and state agencies typically charged with looking after cultural heritage said they had no jurisdiction in this case, because the remains were discovered on private land in a privately funded project. The site manager told the paper that unless someone claimed them, the bones would buried in the concrete floor of the building's parking garage. "They'll be there forever," he said.

That's when Moran called Anna Dhody, director of the Mütter Institute and curator at the Mütter Museum. Dhody contacted the developer and said the museum would take temporary custodianship of the remains, clean them, and then re-inter them at Mount Moriah, with which the museum already had a relationship.

The construction crew resumed work. In late February, Dhody got an email from PMC saying a backhoe had unearthed more remains. Dhody asked how many more. “‘You’d better come down here,’” the PMC representative told her.

So she and Moran did. “And there’s just remains everywhere,” Dhody recalled to mental_floss. There were both exposed bones and sealed coffins, which would turn out to be buried three to four deep in some places. “It became clear to us that there at least was a substantial chunk of the cemetery that had not even been touched," Dhody says.

In March, Dhody and Moran put together an emergency archaeology dig to remove all the human remains. Dhody says, “We sent out the bat signal, or the trowel signal” to colleagues all over the country. Archaeologists and forensic scientists from Massachusetts to Maryland joined the roughly week-long salvage operation. PMC paused construction and loaned equipment and crew for the project.

Working in teams of 12, the crew excavated an area roughly 20 feet x 50 feet x 6 feet, mapping the layout of the discoveries on paper by hand as a photographer documented it all. “The concentration of coffins in there was staggering,” Dhody says.


In all, at least 80 sets of human remains were found during the emergency excavation—but there are a lot more people than that, says Moran. That single box of bones turned into 50 boxes, many of them unassociated with coffins, of which there are about 70. Roughly half of the coffins are intact. In all, Moran says, there are at least 100 people—so many, the researchers can’t house them all in one spot, so the remains are currently divided among a few locations, including the Mütter Museum and Rutgers-Camden.

More may remain underground, hidden beneath adjacent standing buildings; according to historical maps of the cemetery, the area they excavated was in the middle of the burying ground. In that area, at least, “I’m hopeful that we got everyone out,” Moran says.

Now here’s where you come in. The researchers are trying to raise $20,000 to house the remains in one place and analyze them. It's called the Arch Street Bones Project. Right now, the research is entirely reliant on crowdfunding.

The project has the potential to open a new window on life in Philadelphia, the first capital of the United States, through some of the most transformative periods of American history—from the pioneering urban settlements of the early 18th century through the period just before the Civil War. Who were these early Philadelphians? Were they European or African? What were their lives like? What did they eat? How did manual labor and childbirth leave marks on their bones? What kinds of diseases and injuries plagued them? Did some of them die during the 1793 yellow fever epidemic, and others the 1849 cholera epidemic? Their bones hold the potential to answer all of these questions.

I’m going to be there in the lab with the scientists as they conduct their research, including opening some of these coffins for the first time.


The first step will be to create a biological profile of each person: sex, age at time of death, height, racial or ethnic origin, and any injuries or pathologies that leave marks on the skeleton, such as osteoporosis. Further down the line, the research team would like to do isotopic studies (which can indicate where they were born), hair analysis, and analytical chemistry of the bones to identify the kinds of foods they were eating, and whether the dead had any nutritional deficiencies.

The team already has some initial insights into the remains. “We truly have a cross-section of society,” says Moran. “We have everything from the very, very young—the smallest coffin that I personally excavated was not much larger than a shoebox—and then we have the very, very old. We have some individuals who’ve lost all their teeth, and you can tell from their bones that they made it well into their ‘70s, or maybe even beyond, which is pretty significant for this time period, when mortality rates were relatively high, and people didn’t live too long. We’ve got men and women, we’ve got teenagers … and that’s great, because that gives us a really interesting sample population.”

Moran continues, “A number of people—and some of them pretty old people—had various ridges on their long bones of their arms and legs that were well defined, and that’s indicative of having some pretty significant muscle mass. So I don’t know if that means these individuals were laborers, but they were strong. Even the old people were strong.”


These muscled people were split between men and women. One woman, whose remains were found in the last coffin the team pulled out of the ground, was virtually toothless—but she had nevertheless been very strong when she died.

Other initial findings suggest unique genetic traits shared among several people. “We have quite a few people that appear to be male—their pelvis tells us they’re males—but they kind of have feminine facial features,” Moran says. She cautions that these are very preliminary assessments, but “on the very surface of things, we have quite a few men whose skulls don’t have the same kind of heavy, masculine features that you would expect to see in a masculine skeleton—they don’t have a heavy brow ridge, or other kind of prominent skull features. So that’s interesting.”

These kinds of unexpected skeletal features may be useful to family, racial, and ethnic identification. For additional insight, the researchers are bringing in a forensic artist who does facial reconstructions based on skull features.

So far, surprisingly few artifacts have been recovered. There are few textiles beyond the soles of leather shoes. There are no buttons or aglets, jewelry or hair pins. There is a good amount of hair—which is also surprising, because the same soil conditions that caused some bones to crumble should've also destroyed the hair.


After analysis, the remains will be re-interred at Mount Moriah Cemetery—and the researchers are determined that it will actually happen this time, unlike in 1859. (Mount Moriah is itself in disrepair, but that's another story.) No one “owns” these remains. The researchers have custodianship over them for now, and they are fascinated with the remains’ potential to reveal new insights about the history of Philadelphia and the United States. But they’re also keenly aware of the fact that these people need to be interred in section 112 of Mount Moriah—the place they were supposed to have been all this time.

It's unclear whether anyone was moved to Mount Moriah. "There are headstones in section 112 that belonged to the First Baptist folks, but they were repurposed into a walkway," Moran says. "There are some headstones that are standing, but they are too weathered to see any inscription. It’s hard to say if anyone was moved. Section 112 was used after the 1860 move, so there are lots of more modern burials there. I’m not sure if we’ll ever know for sure."

Nevertheless, Moran and Dhody hope that by cross-referencing with historical documents—archives, death and church records, newspaper accounts—there's a chance that they may be able to identify some of these individuals and, potentially, their living descendants.

“We’re just generally trying to be respectful,” Moran says. “We don’t want to make this a salacious story.”

If you’re as fascinated with this discovery as the researchers are—and I am—then chip into the project, and join us in the lab. Dhody says, "We've got years of work ahead of us."

All photos are courtesy of The Mütter Institute of The College of Physicians of Philadelphia.

10 of the Most Popular Portable Bluetooth Speakers on Amazon

Altech/Bose/JBL/Amazon
Altech/Bose/JBL/Amazon

As convenient as smartphones and tablets are, they don’t necessarily offer the best sound quality. But a well-built portable speaker can fill that need. And whether you’re looking for a speaker to use in the shower or a device to take on a long camping trip, these bestselling models from Amazon have you covered.

1. OontZ Angle 3 Bluetooth Portable Speaker; $26-$30 (4.4 stars)

Oontz portable bluetooth speaker
Cambridge Soundworks/Amazon

Of the 57,000-plus reviews that users have left for this speaker on Amazon, 72 percent of them are five stars. So it should come as no surprise that this is currently the best-selling portable Bluetooth speaker on the site. It comes in eight different colors and can play for up to 14 hours straight after a full charge. Plus, it’s splash proof, making it a perfect speaker for the shower, beach, or pool.

Buy it: Amazon

2. JBL Charge 3 Waterproof Portable Bluetooth Speaker; $110 (4.6 stars)

JBL portable bluetooth speaker
JBL/Amazon

This nifty speaker can connect with up to three devices at one time, so you and your friends can take turns sharing your favorite music. Its built-in battery can play music for up to 20 hours, and it can even charge smartphones and tablets via USB.

Buy it: Amazon

3. Anker Soundcore Bluetooth Speaker; $25-$28 (4.6 stars)

Anker portable bluetooth speaker
Anker/Amazon

This speaker boasts 24-hour battery life and a strong Bluetooth connection within a 66-foot radius. It also comes with a built-in microphone so you can easily take calls over speakerphone.

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4. Bose SoundLink Color Bluetooth Speaker; $129 (4.4 stars)

Bose portable bluetooth speaker
Bose/Amazon

Bose is well-known for building user-friendly products that offer excellent sound quality. This portable speaker lets you connect to the Bose app, which makes it easier to switch between devices and personalize your settings. It’s also water-resistant, making it durable enough to handle a day at the pool or beach.

Buy it: Amazon

5. DOSS Soundbox Touch Portable Wireless Bluetooth Speaker; $28-$33 (4.4 stars)

DOSS portable bluetooth speaker
DOSS/Amazon

This portable speaker features an elegant system of touch controls that lets you easily switch between three methods of playing audio—Bluetooth, Micro SD, or auxiliary input. It can play for up to 20 hours after a full charge.

Buy it: Amazon

6. Altec Lansing Mini Wireless Bluetooth Speaker; $15-$20 (4.3 stars)

Altec Lansing portable bluetooth speaker
Altec Lansing/Amazon

This lightweight speaker is built for the outdoors. With its certified IP67 rating—meaning that it’s fully waterproof, shockproof, and dust proof—it’s durable enough to withstand harsh environments. Plus, it comes with a carabiner that can attach to a backpack or belt loop.

Buy it: Amazon

7. Tribit XSound Go Bluetooth Speaker; $33-$38 (4.6 stars)

Tribit portable bluetooth speaker
Tribit/Amazon

Tribit’s portable Bluetooth speaker weighs less than a pound and is fully waterproof and resistant to scratches and drops. It also comes with a tear-resistant strap for easy transportation, and the rechargeable battery can handle up to 24 hours of continuous use after a full charge. In 2020, it was Wirecutter's pick as the best budget portable Bluetooth speaker on the market.

Buy it: Amazon

8. VicTsing SoundHot C6 Portable Bluetooth Speaker; $18 (4.3 stars)

VicTsing portable bluetooth speaker
VicTsing/Amazon

The SoundHot portable Bluetooth speaker is designed for convenience wherever you go. It comes with a detachable suction cup and a carabiner so you can keep it secure while you’re showering, kayaking, or hiking, to name just a few.

Buy it: Amazon

9. AOMAIS Sport II Portable Wireless Bluetooth Speaker; $30 (4.4 stars)

AOMAIS portable bluetooth speaker
AOMAIS/Amazon

This portable speaker is certified to handle deep waters and harsh weather, making it perfect for your next big adventure. It can play for up to 15 hours on a full charge and offers a stable Bluetooth connection within a 100-foot radius.

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10. XLEADER SoundAngel Touch Bluetooth Speaker; $19-$23 (4.4 stars)

XLeader portable bluetooth speaker
XLEADER/Amazon

This stylish device is available in black, silver, gold, and rose gold. Plus, it’s equipped with Bluetooth 5.0, a more powerful technology that can pair with devices up to 800 feet away. The SoundAngel speaker itself isn’t water-resistant, but it comes with a waterproof case for protection in less-than-ideal conditions.

Buy it: Amazon

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This Football-Sized Fossil Egg is the First Found in Antarctica, and It May Have Belonged to a Mosasaur

An artist’s interpretation of the birth of a baby mosasaur.
An artist’s interpretation of the birth of a baby mosasaur.
Francisco Hueichaleo, 2020

In 2011, Chilean scientists discovered a football-sized fossil off the coast of Seymour Island, near the northern tip of the Antarctic Peninsula. Though they didn’t know what it was at the time—and simply called it “The Thing”—new research shows that not only is it the first fossil egg ever found in Antarctica, it’s also the largest soft-shelled egg ever found anywhere.

In a study published today in the science journal Nature, researchers from the University of Texas at Austin and the University of Chile dated the nearshore rock formation where the fossil egg was found to be from the Late Cretaceous period—about 68 million years ago—and measured the fossil itself to be roughly 11.4 inches by 7.9 inches (29 centimeters by 20 centimeters). This empty, partially collapsed egg is smaller only than that of the elephant bird, an extinct, flightless species from Madagascar whose eggs averaged about 12 inches by 8 inches.

giant fossil egg from antarctica
A side view of the fossil egg.
Legendre et al. (2020)

But beyond their size, the eggs don’t have much in common; an elephant bird egg is about five times thicker than this fossil egg, and its hard shell has distinct pores and a prismatic layer that the fossil egg lacks. In other words, an elephant bird egg resembles a giant chicken egg. (And giant is no exaggeration—an elephant bird egg could hold the contents of about 150 chicken eggs.)

elephant bird egg next to a chicken egg
An elephant bird egg next to a chicken egg (and a man's head), to put it in perspective.
Oli Scarff/Getty Images

With its soft shell and oblong shape, the new fossil egg, from the new taxon Antarcticoolithus bradyi, is more similar to a lizard or snake egg, which suggests it could’ve been laid by a large reptile. To test that theory, the researchers compared it to the egg traits of 259 species of lepidosaurs—a subclass of reptile that includes snakes and lizards—and surmised that the egg-layer may have been a marine reptile that measured roughly 23 feet (7 meters) or longer.

The researchers believe this mystery mother might have been a mosasaur, a type of large marine lepidosaur whose remains have also been discovered in the area. During the Late Cretaceous period, mosasaurs were among the most fearsome predators in the ocean. They had strong flippers and sharp teeth, and some species grew as long as 50 feet (though that’s still a good 10 feet shorter than the fictional mosasaur depicted in 2015’s Jurassic World). Fossilized contents of their stomachs show they feasted on a variety of wildlife, including fish, seabirds, turtles, plesiosaurs, and more—one mosasaur had even eaten a few other mosasaurs. And although mosasaurs did live in Antarctica, the continent during the Late Cretaceous period looked nothing like its current frigid landscape.

“Antarctica was rich in life,” Dr. Julia Clarke, a professor in UT Austin’s Department of Geological Sciences and co-author of the study, tells Mental Floss. “Temperate forests diverse in plant species covered exposed land. Giant marine reptiles and much smaller coiled ammonites and relatives of living birds hunted in the seas, while on land, mid-sized non-avian dinosaurs ambled.”

mosasaur birth and egg
The egg looks a lot smaller when you compare it to a full-grown mosasaur.
Francisco Hueichaleo, 2020

Since scientists have uncovered the remains of mosasaurs and plesiosaurs of all ages in the rock formation where the fossil egg was found, some think it may have been a popular place for creatures to hatch and raise their young.

“Many authors have hypothesized that this was sort of a nursery site with shallow protected water, a cove environment where the young ones would have had a quiet setting to grow up,” Lucas Legendre, a postdoctoral researcher and the lead author of the study, said in a press release.

If the fossil egg really did belong to a mosasaur, it could alter our understanding of how mosasaurs gave birth. In South Dakota during the 1990s, scientists unearthed the skeleton of a lizard-like mosasaur called a Plioplatecarpus with five unborn offspring preserved in its abdomen. Because they weren’t in eggs, it was generally thought that mosasaurs gave birth to live young. The existence of Antarcticoolithus bradyi, however, suggests the possibility that some mosasaurs laid soft-shelled eggs that hatched immediately after.

According to Clarke, the discovery of the fossil egg is especially exciting because it demonstrates “how much we have yet to learn about the evolution of eggs, from the first egg-layers that moved away from water to the immense diversity of eggs and reproductive strategies we see today.”