What's Happening?
Researchers have employed a novel laser technique to analyze the preservation fluids in Charles Darwin's specimen jars without opening them. This method, known as spatially offset Raman spectroscopy (SORS), allows scientists to identify the chemical composition
of the fluids by taking multiple laser measurements. The study, conducted at the Natural History Museum in London, revealed that most mammals and reptiles were preserved with formalin and ethanol, while invertebrates were stored in formaldehyde. This technique is significant as it helps preserve the integrity of over 100 million fluid-preserved specimens in museums worldwide, which are often too risky to open.
Why It's Important?
The use of SORS in analyzing preservation fluids is crucial for the conservation of historical biological specimens. By identifying the fluids without opening the jars, museums can prevent potential damage from evaporation or contamination. This advancement not only aids in the preservation of Darwin's specimens but also has broader implications for museums globally, ensuring that invaluable scientific collections remain intact for future research. The ability to monitor and care for these specimens without compromising their integrity is a significant step forward in museum conservation practices.
