Context:

A black, tar-like substance discovered on the rudder shaft of the research vessel Blue Heron, docked after a cruise on the Great Lakes, was found to be teeming with previously unknown microorganisms. This mysterious goo, informally named 'ShipGoo001', thrived in the oxygen-free environment of the closed-off rudder shaft, raising questions about its origins and potential for biocorrosion. Researchers discovered genetic material related to microbes found in various global environments, suggesting a broad distribution of similar life forms. Scientists are investigating whether the goo's microorganisms could have practical applications, such as biofuel production, while also considering the implications for shipbuilding. The discovery highlights the potential for finding novel microbial habitats in unexpected places, prompting further exploration and study of such environments.

Dive Deeper:

• The research vessel Blue Heron's crew discovered a black, tar-like substance oozing from the ship's rudder shaft, which was found to contain a variety of life forms, including unknown microorganisms. This discovery was unexpected as the rudder shaft is a closed-off environment not typically exposed to the outside world.

• The substance, dubbed 'ShipGoo001', was thriving in an oxygen-free environment, which suggests a complex food web sustaining it. Researchers are interested in the potential for biocorrosion, which could degrade the ship's steel, posing concerns for long-lived ships in the Great Lakes.

• DNA analysis revealed that some genetic material from the goo matches microorganisms found in diverse environments such as tarball-type substances in the Mediterranean and hydrocarbon-contaminated sediments in Calgary, Alberta. This suggests that similar microorganisms might inhabit various global ecosystems.

• Scientists are considering the implications of these findings for future shipbuilding, particularly the possibility of microbial corrosion in critical infrastructure. The discovery of methane-producing organisms within the goo could also have applications in biofuel production.

• The origin of the goo remains uncertain, with hypotheses including the possibility of it being brought to the rudder shaft through marine snow or resulting from previous oiling by the ship's former owners. Researchers aim to trace the ship's history to better understand the goo's presence.

• The discovery underscores the importance of maintaining a curious and microbiologically literate culture among researchers, as unexpected findings can lead to significant scientific advancements. It raises broader questions about the potential for undiscovered microbial habitats in other seemingly inhospitable environments.