In the predawn darkness, workers on the Paluxy River in Texas began uncovering something that did not belong. The riverbed was famous for its dinosaur tracks, hundreds of them preserved in stone. But as the crew cleared away debris from the exposed rock, they noticed that some of the impressions did not match the massive three-toed footprints of the ancient reptiles. There, embedded in the same layers of Cretaceous stone, were what appeared to be human footprints, walking side by side with the dinosaurs.
If those prints were genuine, humans had existed on Earth a full sixty-five million years earlier than every accepted model of science said was possible. The strangest discoveries are rarely the ones that announce themselves loudly. They are the artifacts that fall out of a drill, the fossils that resemble something that should not exist, the charts that show a continent long before anyone knew it was there. For as long as people have studied the natural world, they have collected these anomalies, objects that refuse to fit into the neat timelines and categories that experts construct around them.
Some have elegant explanations waiting to be found. Others have defied every attempt to understand them for centuries. The Viking swords known as Ulfberht blades were among the most feared weapons of the early medieval world. They were carried by warriors across Northern Europe during the Viking Age, their long double-edged blades and straight crossbars making them the choice of the wealthier members of society who could afford the enormous price, the equivalent of up to twenty-four thousand dollars in today’s money.
Only about 170 of these swords are still known to exist, each one dating to between the ninth and eleventh centuries. The name Ulfberht was something new in the world of smithing: an early form of trademark, inscribed directly into the blade to signal that the weapon had been made in a certain way and to a certain standard. The swords were stronger, sharper, and better than anything else of their time, and the most remarkable part was the metal itself. The key to a good sword is carbon.
Mix too much of it with iron and the blade becomes brittle and breaks in combat. Use too little and the sword bends under stress, useless after a single heavy blow. The Ulfberht smiths achieved the perfect balance, producing a blade that held its edge and its shape through the violence of medieval battle. The techniques they used to accomplish this were so advanced that they could not be replicated until the Industrial Revolution, hundreds of years later.
And to this day, no one knows how the blacksmiths of the ninth century managed to craft such weapons with the methods available to them at the time. In the world of paleontology, a similar mystery has emerged around a creature known as the Daemonosaurus. The first fossil was found in Italy, crushed and damaged, and it had to be painstakingly reconstructed. Scientists looked at the remains and concluded that they belonged to an extinct reptile.
Then a second fossil was discovered at Ghost Ranch in New Mexico, and this one changed everything. Where the creature should have had fingers, it had a giant claw on each hand, attached to a flat bone that appears in no other known animal. It had a slender snout, a long muscular tail, and a tail spike that it apparently used to hold onto trees. The more researchers studied it, the less it looked like a reptile at all.
It resembled a mammal, and not just any mammal, but the anteater. The problem this presents is profound. Evolution holds that animals change gradually over time, and that fossils should show a pathway leading toward the forms we see today. But here was a fossil so similar to a living creature that it seemed to jump across millions of years of development.
Some researchers suggested that the two species evolved independently of one another, that the resemblance was a case of convergent evolution. Others argued that the very existence of Daemonosaurus called the entire framework into question. Just as bizarre, though far smaller, is the phenomenon known as the rat king. For centuries, European legend has told of these strange formations, when a number of black rats become attached to one another by their tails.
The tails twist and tangle into a knot, and the rats lose the ability to move independently. Unable to hunt or flee, they die slowly, trapped in a ball of their own suffering. Only the black rat seems to form these knots, though it has occasionally happened with squirrels. Despite centuries of written accounts, only a handful of actual specimens have ever been recovered.
Science cannot explain what causes the tails to become tangled, because the behavior has never been documented in living rats. Perhaps it is a birth defect, or something that happens when rats huddle together in cold temperatures for warmth. Perhaps an adhesive liquid or sticky substance on the rats’ skin starts the process. No one knows.
The phenomenon makes no sense, yet the specimens exist. In 1984, a meteorite fell to Earth, and for reasons unknown to science at the time, it carried within its stone a mystery that would consume researchers for decades. The rock, known as Allan Hills 84001, was determined to be about four billion years old, and it had a remarkable history. Scientists concluded that it originated on Mars, that it had been dislodged from the red planet during a collision with another body and had drifted through space until gravity pulled it into Earth’s atmosphere.
What made this particular meteorite extraordinary was what its surface appeared to show: structures that had the look of fossilized bacteria. If those structures were biological in origin, they would be proof that life once existed on Mars, or even that life found its way to Earth by hitching a ride on a rock from another world. Numerous studies have been conducted on the meteorite over the years, and even now, nearly thirty-five years after it was found, no conclusions can be made. The structures could be the fossilized remains of microbial life, or they could be geological formations that merely happen to look like something unusual.
Newer analytical techniques continue to be developed, and researchers hope that they may finally unlock the answer. By the time NASA has the chance to discover evidence of life on Mars itself, it may turn out that the truth has been here on Earth all along. In the Shang province of China, near the village of Xian Bun, a far more grounded discovery has left researchers equally baffled. In 1992, a series of underground structures was found, and none of it made sense.
The Long Yu Grottoes are at least two thousand years old, carved almost a hundred feet into solid siltstone. There are thirty-six of them, covering an area of thirty thousand square meters. Each grotto contains rooms, gutters, and pools, all carved with a precision that is difficult to explain. Scientists and researchers have no idea how they were built, what they were used for, or who was responsible for them.
The grottoes were flooded for centuries, until the government drained many of them to allow for further exploration. The craftsmanship proves that an advanced civilization once lived in the region, yet no documentation of that civilization has ever been found. The stones are remarkable, and every new discovery within them only generates more questions that science is unable to answer. The hunt for the first dinosaur has taken a series of surprising turns.
For a long time, paleontologists believed that the earliest known dinosaur was the Eoraptor, a small creature whose fossils were found in a 231-million-year-old rock formation in Argentina. But a recent discovery in Tanzania has thrown that assumption into doubt. A new species, called Nyasosaurus, was found there, and its fossils date back more than 241 million years. This creature could be the true first dinosaur, or it could be a relative of the early dinosaurs, and it is becoming increasingly difficult to know where the line actually is.
Even if Nyasosaurus is determined to be a genuine dinosaur, there is still the possibility that a new fossil could be found that predates it. The search for the first giant reptile will continue, and it is unlikely ever to be fully resolved. The Nampa stone doll was pulled out of the earth in 1889, in circumstances that defy easy explanation. Workers near the town of Nampa in Idaho were searching for water and drilling a well.
The bore hole went down 295 feet, and at that depth the drill began to spit out clay, and within the debris that was pulled up came a small figurine, carved to look like a doll. The depth itself was the problem. The workers had drilled through a geological layer known as the Glenn’s Ferry Formation, a United States national landmark because it contains one of the greatest collections of animal and plant fossils in North America. That formation was created about two million years ago, during the Pliocene-Pleistocene era.
If the doll had come from where it appeared to come from, it meant that it originated in a time long before humans were known to have existed in the region. Some researchers have suggested that another creature made it. Most believe it is simply a hoax, an artifact planted to fool researchers, or that the doll somehow fell through fissures in the earth and settled among relics from a much earlier time. None of these explanations is certain, and the doll remains a mystery.
In 1513, a Turkish cartographer and sailor named Haji Ahmed Muhiddin Piri completed a map that has frustrated scientists for centuries. Known as the Piri Reis map, it was drawn using twenty different charts and documents as sources. The map is unnervingly accurate, but that is not what makes it strange. It depicts Antarctica, a continent that would not be officially discovered for more than three hundred years.
And it shows the southernmost landmass as it would have appeared more than six thousand years ago, free of ice. No ancient civilization is known to have navigated the oceans well enough to map Antarctica in that state, and no one can explain how Piri got the details right. The map is also drawn using a projection that should not have been possible until the invention of the chronometer in 1760. How a cartographer more than two centuries earlier managed to achieve such accuracy remains unknown.
The Voynich manuscript has earned a reputation as the most mysterious book ever written. The six-hundred-year-old volume is made up of 240 pages, each written in a cryptic text with unusual diagrams and illustrations. Scientists, cryptographers, and code breakers have all attempted to decode it, and every one of them has failed. It is possible that the book is complete nonsense, but the intricacy of the images suggests that the author was highly intelligent.
Recently, Canadian researchers used artificial intelligence to analyze the text, and the program detected what appeared to be Hebrew words on the opening pages, though spelled in an incorrect way. Some of those words could be deciphered as botanical terms, but they do not make sense in the context in which they are written. Even the most powerful computational programs designed specifically for the task have failed to crack the manuscript, and it continues to puzzle researchers to this day. Which brings the story back to the Paluxy River.
The dinosaur tracks there are well documented, hundreds of them preserved in the riverbed. But alongside them are the impressions that some researchers read as human footprints, and the implications of that are staggering. It is possible that the shapes are simply a case of mistaken identity, that erosion or coincidence created forms that resemble the human foot. Or it is possible that they are evidence that humans walked the Earth when the dinosaurs did, a notion that would overturn everything science claims to know.
Some have even suggested that the prints are the work of aliens. The debate continues, and no one has been able to settle it. The footprints remain there, pressed into the stone, waiting for an answer that has not yet come.
