Behind the scenes at the American Museum of Natural History lie vast collections that visitors never get to see. The museum draws nearly 5 million people through its doors each year and is considered one of the world's premier scientific institutions, with miles of exhibits that tell the story of the natural world. Yet only a sliver of what the museum holds is ever placed on display.
The scale of what stays hidden is striking. According to the museum, just 0.2% of its fossils are on display at any given time. That means the overwhelming majority of its fossil collection sits out of public view, stored away in spaces that the millions of annual visitors never pass through on their way around the galleries and exhibition halls.
One of those spaces has a fittingly blunt name. The museum calls it the big bone room, a storage area located in the basement and closed to the public. It is where staff keep the largest specimens, including dinosaur limb bones, backbones and vertebrae, and even skulls, all gathered together in a single room dedicated to the most massive pieces in the collection.
Guiding the way through it was Roger Benson, the Macaulay Curator of Dinosaur Paleobiology at the American Museum of Natural History. He described a room filled with giant dinosaur bones, the kind of fossils that are far too large and too numerous to put on show all at once. For him, the space functions as part working archive and part window into the deep past of life on Earth.
Among all those bones, one stands out. Benson pointed to a femur, or thigh bone, as probably the biggest in the room. He noted that it is taller than he is, an enormous piece that is, remarkably, only the thigh bone of a single dinosaur. It is the kind of object that drives home just how large these animals once grew.
The same femur carries significance beyond its sheer size. Benson said it is also one of the oldest dinosaur bones in the museum's collection. That combination, both immense and ancient, helps explain why the curator and his colleagues treat the room as something far more valuable than simple storage space tucked out of sight.
For Benson, the big bone room is unlike anywhere else. He described it as a space like no other in the world, one that contains some of the oldest dinosaur fossils on the planet. Hidden away in the basement and kept off the public path, it holds a chapter of natural history that the vast majority of museum visitors will never see in person.