High-resolution scans of a sizable Egyptian crocodile mummy have revealed a secret that the croc had literally kept under wraps for 2,000 years.
There were unexpected stowaways hidden under the mummy's bandages — dozens of baby crocodiles, each one individually swaddled.
Earlier scans of the mummy completed in 1996 had found that the so-called "giant" crocodile, which measures about 10 feet (3 meters) in length, was actually two smaller juveniles, placed together and wrapped to resemble one much larger individual.
But those scans didn't tell the whole story. It wasn't until recently, when additional scans were acquired and carefully scrutinized, that 50 tiny, hidden crocodiles also came to light. [Photos: Giant Crocodile Mummy Packed with Baby Crocs]
The crocodile mummy is part of the Egyptian Collection at the Dutch National Museum of Antiquities (DNMA). The DNMA scientists conducted new 3D X-ray scans of the object, and collaborated with Swedish visualization group Interspectral to create a digital model of the mummy for an interactive "virtual autopsy," which would allow visitors to strip away the mummy's layers and explore what lies beneath.
The 50 baby crocodiles were wrapped in the pine rope bindings that secured the two juvenile crocodiles together, according to a statement released by Interspectral. They were likely all mummified together as an offering to the crocodile god Sobek, and additional plant material, wads of fabric and coils of rope padded them to form a single, massive crocodile shape, DNMA Egyptologists suggested in the statement.
Computed X-ray tomography (CT) technology has improved greatly since the mummy was first scanned in 1996. But although the recently gathered data was more detailed than the older scans, it still required extensive interpretation, Interspectral co-founder Claes Ericson told Live Science in an email. He explained that the technician had already been working with the mummy's data sets when he zoomed in on an unusual detail purely by chance, discovering that it was a tiny skeleton.
"It's a combination of good hardware (the scanner), good software (Inside Explorer), a good pair of eyes and luck," Ericson said.
To noninvasively explore fragile specimens such as this one, researchers and museum conservators use a variety of scanning technologies, including laser scanning, photogrammetry, CT scans and lidar (light detection and ranging), Ericson said. But only CT scanning captures internal and external structures in three dimensions. In this case, the scans allowed DNMA curators to observe details in the mummy that previously went undetected, presenting them with exciting new information about an important artifact.
"When we started work on this project, we weren't really expecting any new discoveries," a DNMA curator said in a statement published Nov. 15. "What was intended as a tool for museum visitors has yet produced new scientific insights."
The crocodile mummy interactive and the newly renovated DNMA Egyptian galleries opened to the public Nov. 18.
Original article on Live Science.