But while collecting water samples for this project, they keep their eyes peeled for their true passion, the dolphins.

NPR: Dolphins Dodge Danger in the Bosphorus Strait

That project will seek to return samples of organic materials from an asteroid to help scientists understand how the building blocks for life may have been seeded on the early Earth.

CNN: University of Arizona looks beyond Mars mission

But the work has begun: the Human Serum Metabolome Project at Manchester University is collecting samples from over 5, 000 people.

ECONOMIST: Metabolomics