20 of History’s Most Baffling Mysteries That Have Only Recently Been Solved

For more than 70 years, the unidentified man found dead on Somerton Beach in Adelaide in 1948 was one of Australia’s most famous mysteries. In 2022, thanks to forensic genetic genealogy, his identity was finally established: he was Carl “Charles” Webb, an electrical engineer and instrument maker born in Melbourne. While the cause of death remains unclear, the central question of his identity no longer seems out of reach.

For centuries, people have debated what became of Richard III’s body after his death at the Battle of Bosworth in 1485. In 2012, archaeologists unearthed a skeleton beneath a parking lot in Leicester, and DNA analysis confirmed in 2013 that the remains were indeed those of the long-lost king. This discovery not only pinpointed the location of his grave; it also corrected long-held assumptions about how his body had disappeared from history.

Sir John Franklin’s Arctic expedition disappeared in the 1840s while searching for the Northwest Passage, leaving behind one of Canada’s most perplexing historical mysteries. The wreck of HMS Erebus was located in 2014, followed by that of HMS Terror in 2016, with Inuit knowledge playing a key role in these searches. These discoveries did not answer all the questions about the crew’s final days, but they did solve the central mystery of the ships’ location.

Ernest Shackleton’s ship, the Endurance, sank in the Weddell Sea in 1915 after being crushed by Antarctic ice. Although Shackleton’s crew survived, the ship itself remained missing until the Endurance22 expedition located it in March 2022. The wreck was discovered in remarkably good condition, offering historians a firsthand look at a ship whose existence had previously been known only through photographs, diaries, and survival accounts.

After the assassination of the Romanov family in 1918, rumors persisted for decades that one or more of the imperial children had survived. DNA analysis of human remains found in a second grave, discovered in 2007, provided strong evidence that the two missing children were Tsarevich Alexei and one of his sisters. This discovery put an end to one of the most persistent escape legends of the 20th century.

The identity of the Zodiac Killer remains unknown, but one of his most famous messages has finally been deciphered. In 2020, a team of private cryptologists succeeded in deciphering this 340-character message that had baffled investigators and enthusiasts since 1969, and the FBI confirmed this breakthrough. The decoded message did not reveal the killer’s identity, but it did answer one of the most famous unanswered questions in the case.

For generations, researchers have wondered where the medieval Black Death originated before ravaging Europe, the Middle East, and North Africa. In 2022, analysis of ancient DNA from plague victims buried in what is now Kyrgyzstan identified this region as the likely source of the pandemic’s rapid spread in the 14th century. This research has made it possible to link ancient funerary inscriptions, archaeological discoveries, and bacterial genomes in a way that previous historians simply had not been able to do.

L’Anse aux Meadows, in Newfoundland, had already shown that Norse travelers had reached North America long before Christopher Columbus, but the exact date remained uncertain. In 2021, researchers used evidence of a known solar storm, preserved in tree rings, to establish that the Vikings were present in this region in 1021 AD. This precise date provided historians with a solid reference point for one of the earliest and most significant transatlantic crossings.

Stonehenge has given rise to a long list of mysteries, and one of the greatest concerned the origin of its massive central altar stone. Research published in 2024 revealed that the mineral composition of this stone matched that of rocks from northeastern Scotland, not Wales as many had suspected. This discovery raised new questions about how it was transported, but it helped solve much of the mystery surrounding the origin of this six-metric-ton stone.

People have long wondered why certain concrete structures from ancient Rome have lasted for nearly 2,000 years, while many modern materials deteriorate much more quickly. In 2023, researchers reported that fragments of lime present in Roman concrete may have helped repair cracks when water penetrated the material. This discovery showed that what once appeared to be a haphazard mixture may in fact have contributed to the material’s enduring strength.

The Confederate submarine H.L. Hunley was the first combat submarine to sink an enemy warship, but it disappeared that very night in 1864. When it was salvaged, the crew appeared to have died at their posts, with no obvious signs of flight or panic. A study published in 2017 suggested that the shock wave caused by the submarine’s torpedo likely killed the crew almost instantly, thereby solving a mystery from the Civil War that had lasted for more than 150 years.

Tutankhamun’s iron dagger has puzzled researchers because it was made at a time when iron metallurgy was rare in Egypt. An analysis conducted in 2016 using a portable X-ray fluorescence device revealed that the blade’s composition matched that of meteoritic iron, notably featuring high levels of nickel and cobalt. This finding helped explain both the dagger’s unusual material and why such an object would have been considered a royal treasure.

It was long believed that a lavish Copper Age burial site discovered in Spain belonged to a man from the elite, due to the extraordinary grave goods found alongside the body. In 2023, peptide analysis of dental enamel revealed that the individual was a woman, leading researchers to nickname her the “Lady of Ivory.” This discovery has revolutionized the way archaeologists understand power, social status, and gender in prehistoric Iberia.

It was once thought that the Roman-era skeleton known as the “Beachy Head Woman” had recent ancestors from sub-Saharan Africa or the Mediterranean region. However, a DNA study conducted in 2025 revealed that she most likely came from the local population of southern England during the Roman period. This reminds us that past interpretations can change radically when new scientific methods are applied.

The “Vittrup Man” was discovered in a Danish peat bog in 1915, but for a long time, researchers had little idea who he was. A study conducted in 2024, combining DNA analysis, isotopic data, archaeology, and physical analysis, suggested that he was a genetic outsider in Neolithic Denmark, who had likely grown up elsewhere before becoming the victim of a ritual murder. Instead of being merely a poorly preserved skeleton, he has become a person whose story can be traced.

An 800-year-old Norse saga recounts that a man was thrown into a well during a raid on Sverresborg Castle in 1197. Human remains were discovered in that well in the 20th century, but it is only recently that DNA and radiocarbon analyses have significantly strengthened this connection. Researchers concluded that these bones likely belonged to the man described in the saga, thus establishing an unusual connection between a brief medieval text and physical evidence.

The Tudor warship Mary Rose sank in 1545, preserving the remains of many people who had served aboard her. Recent studies of isotopes and ancestry have shown that some crew members had more diverse backgrounds in their childhood than previous assumptions about the Tudor navy had suggested. While we do not have their complete biographies, science has helped make their world far less anonymous.

The Nazca Lines in Peru have fascinated researchers since the 20th century, but many of the smaller figures were difficult to spot from the ground—or even during conventional aerial surveys. In 2024, researchers announced that artificial intelligence had enabled them to identify 303 previously unknown figurative geoglyphs in just a few months of fieldwork. This discovery did not answer all questions about the Nazca culture, but it significantly expanded the data available to researchers for understanding the function and distribution of these figures.

A small bone fragment from Denisova Cave in Siberia seemed, at first glance, unremarkable, but genetic analysis completely transformed its significance. In 2018, researchers demonstrated that it belonged to a young girl whose mother was a Neanderthal and whose father was a Denisovan. This discovery provided scientists with direct evidence that these ancient human groups were not only neighbors but had also had children together.

The Antikythera mechanism, recovered from an ancient shipwreck, has long baffled experts due to the complexity of its gears and its fragmented condition. Modern imaging and modeling techniques have shown that this device could predict the positions of celestial bodies and eclipses, and in 2021, researchers proposed a reconstruction of its front display panel. While some details are still debated, one of the strangest artifacts in history is now far less mysterious than it was a century ago.