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mysterious dinosaur bone damaged in wwii identified, recreated by 3d printer

by:Tuowei     2019-09-07
The identity of a labeled wrong fossil damaged in the explosion of World War II was finally revealed, a huge long termnecked plant-Eat dinosaurs
The fossil is hidden in a plaster jacket wrapped around it more than 100 years ago, belonging to the Berlin National Museum of History.
During World War II, a bomb landed on the east wing of the museum, destroying the basement where dinosaur fossils were stored.
Many fossils were dusty in the explosion, and the surviving fossils were scattered together.
To make matters worse, bones from two separate expeditions were placed in the same area.
An expedition in Tanzania lasted from 1909 to 1913, bringing back 235 tons of fossils, marked in letters according to their location.
Other fossils were found 1909 times in harberstadt, Germany.
Those bones also used a letter.
Label based system
But these letters refer not to places, but to individual animals. [
See Photos of amazing Dinosaur Fossils]
In other words, this is a mess.
\"They still have a hard time sorting out some objects because some labels are broken,\" said research researcher Berlin Sema Issever, a radiologist at the Charité hospital in Berlin.
The paleologist at the mysterious bone Museum asked Issever for help in identifying one of the mysterious fossils.
The fossils were labeled as excavated from Tanzania, but the museum staff were not sure.
Using computed tomography (CT)
Typically used to diagnose scans of patients, researchers can look in plaster and rocks around the fossil to identify the bones inside.
Issever told life science that CT scans are a boon to ancient biologists because it is a slow, hard work to prepare fossils.
Fossil preparation is also at risk, as fragile bones can easily be broken under the chisel of the preparation personnel.
The scan shows that the spine of the dinosaur is 8 inch (21 centimeters)
6 inch long (17 cm)wide.
It belongs to the plateau Dragon, a grass-eating animal that can grow to 33 feet (10 meters)long.
The map of the dinosaur discovery in haberstadt, Germany, includes the rediscovered spine.
By comparing the scan to a long sketch
Before digging, the researchers determined that the spine was excavated from Halberstadt in Germany.
In the chaos of the basement of the post-war museum, it was labeled Tanzania.
The scan showed that a dinosaur had broken bones.
Issever said some of the cracks were undoubtedly caused by petrochemicals.
But a crunch.
Probably the result of the explosion.
To reproduce the pre-explosion bones, the researchers took data from CT scans and produced a blueprint for 3D printing the fossils. Three-
In ancient biology, size printing is an emerging method that researchers use to create a model of the proportion of bones that is perfect.
To this end, researchers used a technology called laser sintering.
In this technique, the laser is programmed to heat the plastic powder and melt it layer by layer into the desired shape.
When the process was completed, the unheated powder was brushed off, revealing a copy of the dinosaur bone, accurate to a kilogramme (one-
One in ten millimeters).
Researchers were even able to print out bone chips from blast damage and put the rest of the spine like a jigsaw puzzle.
\"I\'m just glad it did,\" Issever said . \".
She said she and her colleagues may work with the museum in the future to scan other unknown fossils.
The researchers reported their findings today (Nov. 20)
In the Journal of Radiology
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