Author Archives: Australian Centre for Ancient DNA

About Australian Centre for Ancient DNA

Welcome to the Australian Centre for Ancient DNA (ACAD for short). From here you can access all of ACAD's online presence and explore the fascinating world of ancient DNA. For official resources and our recent publications, see our Website. To hear about life researching in ACAD, check out our Blog, and watch us work on Youtube. Keep up to date by following us on Twitter, Facebook, or Google+. Ancient DNA offers a method of directly exploring a population from the past. Extracting DNA from a wide range of historic and ancient samples, sourced from museums and the field, grants us access to their archaeological, forensic, environmental and zoological histories. Allowing insights into evolution, biodiversity, climate change, paleoecology, and the microbiome. At ACAD, we actively develop and use environmental DNA, and bioinformatic techniques, which, alongside our ancient work, offers our skilled researchers a broad range of methods to gain unique cross-disciplinary insights.

Natural Trap Cave (NTC) update installment

The Barefoot team visited the cavers, archaeologist, paleontologist and biologists at Natural Trap Cave to capture the international team at work.   Fossils as old as 30,000 years were uncovered and taken back to research labs for investigation, including ACAD.  We are working on analysing the array of samples discovered.

Natural Trap Cave – The Pleistocene Epoch from Barefoot on Vimeo.

GMOs: not just for dinner

By Raphael Eisenhofer

Genetically modified organisms (GMOs) are a controversial topic. Broadly speaking, they can be defined as “any organism whose genetic material has been altered using genetic engineering techniques”. In this case, “genetic material” refers to an organism’s DNA, which is the heritable blueprint of life. DNA has four “letters”: A, C, G, and T. Different combinations of these create “words” (called genes) which can be read by our cell’s machinery to build proteins. Proteins are the workhorse molecules of life, performing a diverse set of important tasks in the body, such as producing energy and providing structure to your cells. Continue reading

Extracting DNA: separating the wheat from the chaff

By Andrew Farrer

Reading the sequence of DNA molecules (the order of As, Gs, Cs, and Ts) is how ACAD researchers reconstruct the history of life. However, life at a cellular level is an intricate dance of simple and complex molecules – proteins, fats, carbohydrates – all working in concert to keep cells alive. DNA is part of this dance, the sheet music from which the music is read, providing the master copy of instructions for complex molecules such as enzymes. To ensure each of these molecules is made only when they’re needed, the DNA is not free-floating, but bound, packaged, and carefully regulated. Unfortunately, sequencing machines can only deal with pure DNA; all those other molecules will cause critical errors. So first we must separate the DNA wheat from the chaff by doing a DNA extraction.

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Figure 1: Wheat seed heads. Before the wheat grains can be used, the tough dry cases enclosing them – the husk or “chaff” – must be removed. Credit: Dako99.

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Recovery and identification of missing servicemen

By Jeremy Austin

As we approach the commemoration of ANZAC Day, we are reminded of the more than 25,000 Australian servicemen missing in action who have yet to be recovered and identified. On the 17th June 1917, British and Australian forces launched an offensive against German lines at Messines in Belgium.  Made famous by the film “Beneath Hill 60” , the Battle of Messines  was one of the most successful campaigns by the Allies on the Western Front during World War 1. However, success came at a terrible price with more than 13,500 Australian casualties. Continue reading

Micro-magicians make the cheese

By Raphael Eisenhofer

Microbes get a bad rap. Like many things in life, we focus on their negative aspects—ignoring the positives. While some microbes can make us sick, most of them do not, and many actually help us! One tasty example of humans and microbes working together is the production of cheese.

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Fig. 1: A tiny subset of the varieties of cheese! Credit: dairy.org

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LabARTory – the art of science architecture

By Andrew Farrer

I didn’t make a mistake; I intentionally used Bing. I learnt two interesting things from this: Firstly, it’s amazing how a different search engine introduces you to a very different range of information. Secondly, a lot more thought went into the artistic design of the ACAD ancient DNA lab than I had ever suspected. Continue reading

(Re)introducing the microbial buddy system

By Laurence Clarke

Co-extinction may be the most common form of extinction there is. From the Tasmanian tiger to the gastric-brooding frog, it’s no secret that lots of Australia’s animals have gone extinct. But many tiny microorganisms were dependent on these large animals. What happened to these microbes after the loss of their bigger buddies, and, if we can bring the animals back, will their microbes return too? Continue reading