A bug that has lain dormant for over 120,000 years has been revived by Dr Jennifer Loveland-Curtze and a team of scientists from the Department of Biochemistry and Molecular Biology at Pennsylvania State University.
The Story in Brief
Scientists who want to go bug hunting in space practice by searching out dormant bacteria on earth and reviving them for research.
The latest bug, a tiny brown-purple microbe was discovered when a Gram-negative 1 ultramicrobacterium was isolated from a 120,000-year-old Greenland glacier ice core recovered from a depth of 3,042 metres (3.042 kilometres).
Dubbed Herminiimonas glaciei, the pigmentation of the original colony was brown-purple but after recultivation the colonies were translucent white to tan coloured. It took almost 12 months for the team to revive the microbe (designated strain UMB49T) by gently warming it in an incubator at 2%C for seven months and then at 5%C for a further four and a half months .
The H. glaciei microbe is tiny – ten to 50 times smaller than E. coli (which is also Gram-negative 1). Experts say its small size probably helped it to survive in the liquid veins among the ice crystals.
Dr Loveland-Curtze says that other microorganisms could exist on other worlds and studying Microbes found in extreme conditions on Earth may provide insight into what sorts of life forms could survive elsewhere in the solar system.
More details are available at the International Journal of Systematic and Evolutionary Microbiology and it was reported in the Scientific American in June 2009.
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