CSI in space: Analyzing bloodstain patterns in microgravity | Science & Technology

As more people seek to go where no man has gone before, researchers are exploring how forensic science can be adapted to extraterrestrial environments.

A new study by Staffordshire University and the University of Hull highlights the behaviour of blood in microgravity and the unique challenges of bloodstain pattern analysis aboard spacecraft.

Bloodstain expert Zack Kowalske is a Crime Scene Investigator based in Atlanta, USA, and led the study as part his PhD research at Staffordshire University.

“Studying bloodstain patterns can provide valuable reconstructive information about a crime or accident. However, little is known about how liquid blood behaves in an altered gravity environment. This is an area of study that, while novel, has implications for forensic investigations in space,” he commented.

“Forensic science is more than just trying to solve crimes; it additionally has a role in accident reconstruction or failure analysis. With this concept, consider how various forensic disciplines could be utilized in a critical accident onboard a space station or shuttle.”

Experiments were conducted aboard a Zero Gravity Corporation modified Boeing 727 parabolic aircraft. A mixture of 40% glycerin and 60% red food colouring was used, simulating the relative density and viscosity of human blood. Blood droplets were propelled from a hydraulic syringe toward a target during periods of reduced gravity between 0.00 and 0.05 g. From these blood stains, the researchers reconstructed the angle of impact.

Co-author Professor Graham Williams, from the University of Hull, explained: “With the lack of gravitational influence, surface tension and cohesion of blood droplets are amplified. What this means is that blood in space has a higher tendency to stick to surfaces until a greater force causes detachment. Within the application of bloodstain formation, it means that blood drops exhibit a slower spread rate and, therefore, have shapes and sizes that would not be reflective on…

 read more www.sciencedaily.com

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