Enlarge / Reddit user Kidipadeli75 spotted a fossilized hominin jawbone in his parents' new travertine kitchen tile. (credit: Reddit user Kidipadeli75)

Ah, Reddit! It's a constant source of amazing stories that sound too good to be true... and yet! The latest example comes to us from a user named Kidipadeli75, a dentist who visited his parents after the latter's kitchen renovation and noticed what appeared to be a human-like jawbone embedded in the new travertine tile. Naturally, he posted a photograph to Reddit seeking advice and input. And Reddit was happy to oblige.

User MAJOR_Blarg, for instance, is a dentist "with forensic odontology training" and offered the following:

While all old-world monkeys, apes, and hominids share the same dental formula, 2-1-2-3, and the individual molars and premolars can look similar, the specific spacing in the mandible itself is very specifically and characteristically human, or at least related and very recent hominid relative/ancestor. Most likely human given the success of the proliferation of H.s. and the (relatively) rapid formation of travertine.

Against modern Homo sapiens, which may not be entirely relevant, the morphology of the mandible is likely not northern European, but more similar to African, middle Eastern, mainland Asian.

Another user, deamatrona, who claims to hold an anthropology degree, also thought the dentition looked Asiatic, "which could be a significant find." The thread also drew the attention of John Hawks , an anthropologist at the University of Wisconsin–Madison and longtime science blogger who provided some valuable context on his own website. (Hawks has been involved with the team that discovered Homo naledi at the Rising Star cave system in 2013.)

Enlarge / Three female skeletons found in a Neolithic storage pit in France show signs of ritualistic human sacrifice. (credit: . Beeching/Ludes et al., 2024)

Archaeologists have discovered the remains of two women in a Neolithic tomb in France, with the positioning of the bodies suggesting they may have been ritualistically murdered by asphyxia or self-strangulation, according to a recent paper published in the journal Science Advances.

(WARNING: graphic descriptions below.)

France's Rhône Valley is home to several archaeological sites dating to the end of the Middle Neolithic period (between 4250 and 3600/3500 BCE in the region); the sites include various storage silos, broken grindstones, imported ceramics, animal remains (both from communal meals and sacrifices), and human remains deposited in sepulchral pits. Saint-Paul-Trois-Châteaux is one such site.

Enlarge / A selection of the Fitzwilliam Museum coins that were studied, including coins of Charlemagne and Offa. (credit: The Fitzwilliam Museum, University of Cambridge)

Sometime around 660 CE, silver coinage replaced gold as the dominant form of currency in northwest Europe. But what was the source of all that silver? According to a recent paper published in the journal Antiquity, silver for the earlier post-Roman coins during this period came from Byzantine silver plate, while silver for the later coins most likely came from mines located in Melle, Aquitaine.

“This was such an exciting discovery," said co-author Rory Naismith , a medieval historian at the University of Cambridge. "I proposed Byzantine origins a decade ago but couldn’t prove it. Now we have the first archaeometric confirmation that Byzantine silver was the dominant source behind the great seventh-century surge in minting and trade around the North Sea.”

There are a number of high-tech tools that can be used to learn more about historic currencies. For instance, Michael Wiescher, a nuclear physicist at the University of Notre Dame, has combined XRF scaling with PIXE mapping of Roman denarii to test the currency's quality and learn more about the production techniques. Working with his undergraduate students, he has also used electron spectroscopy to measure the silver content of each coin and learn about how the impurities were distributed.

A small underwater drone called Hydrus has located the wreckage of a 100-year-old coal hulk in the deep waters off the coast of western Australia. Based on the data the drone captured, scientists were able to use photogrammetry to virtually "rebuild" the 210-foot ship into a 3D model (above). You can explore an interactive 3D rendering of the wreckage here .

The use of robotic submersibles to locate and explore historic shipwrecks is well established. For instance, researchers relied on remotely operated vehicles (ROVs) to study the wreckage of the HMS Terror , Captain Sir John S. Franklin 's doomed Arctic expedition to cross the Northwest Passage in 1846. In 2007, a pair of brothers (printers based in Norfolk) discovered the wreck of the Gloucester , which ran aground on a sandbank off the coast of Norfolk in 1682 and sank within the hour. Among the passengers was James Stuart, Duke of York and future King James II of England, who escaped in a small boat just before the ship sank.

In 2022 , the Falklands Maritime Heritage Trust and National Geographic announced the discovery of British explorer Sir Ernest Shackleton 's ship Endurance . In 1915, Shackleton and his crew were stranded for months on the Antarctic ice after the ship was crushed by pack ice and sank into the freezing depths of the Weddell Sea. The wreckage was found nearly 107 years later, 3,008 meters down, roughly four miles (6.4 km) south of the ship's last recorded position. The wreck was in pristine condition partly because of the lack of wood-eating microbes in those waters. In fact, the lettering "ENDURANCE" was clearly visible in shots of the stern.