SAMS - the Scottish Association for Marine Science - is the oldest ocean research and education charity in the United Kingdom. It was founded in 1884 by Sir John Murray, the Edinburgh-born oceanographer who served on HMS Challenger, the 1872-76 round-the-world expedition that effectively invented modern oceanography. Murray spent the rest of his career working through Challenger's haul of samples, sediments, and soundings, and the institute he founded was his way of building a permanent base for the kind of work the Challenger had only sketched. The first home was the Scottish Marine Station at Granton, just outside Edinburgh - Scotland's first marine research station. Within a decade activities began transferring to Millport on the Isle of Cumbrae, where a purpose-built laboratory opened in 1897 and stayed for the next seventy years.

In 1967, after eight decades of work in the relatively sheltered Firth of Clyde, the Association moved north and built new facilities near Oban on the open west coast of Scotland - a location with easy access to deep water, oceanic conditions, and the kind of variety of habitats that the Firth of Clyde could not match. In 1992 the institute took its current name. The labs were rebuilt and re-equipped in 2004, new teaching facilities followed in 2010, and the Ocean Explorer Centre at Dunbeg opened in 2014 to bring visitors into the work. Today SAMS sits within the European Marine Science Park near Dunbeg, a founding partner of the University of the Highlands and Islands, and an associate institute of the United Nations University - a tiny shoreline campus with global research reach.

What Sweetman's team found in 2024 is still being argued over. For more than a century, biology has been clear that oxygen on Earth comes from photosynthesis - plants on land, algae and cyanobacteria in the ocean's sunlit zone. The deep sea, in this picture, is purely an oxygen consumer; the dissolved O₂ down there originally came from the surface and was carried into the depths by sinking, cold water. Sweetman measured oxygen production at the abyssal seafloor, in the dark. The proposed mechanism involves the polymetallic nodules that carpet parts of the Pacific deep sea - the same nodules that mining companies want to extract for cobalt and nickel. If the nodules are somehow producing oxygen, removing them might do something terrible to deep-sea ecosystems we barely understand. The finding remains contested. It is the kind of question that SAMS exists to ask.

The institute's three research programmes span the discovery of basic ocean processes, the response of coastal systems to human pressure, and the development of a sustainable blue economy. Physicists, mathematicians, biologists, geologists, chemists, social scientists, engineers - they all work the same coastline. SAMS operates a Scientific Robotics Academy that uses flying, surface, and diving robots for everything from aerial habitat mapping to deep-water property surveys, and it hosts the Culture Collection of Algae and Protozoa, the largest single collection of algae and protists in Europe. The commercial arm, SAMS Enterprise, manufactures autonomous sensors for snow and ice measurements in extreme environments - the SIMBA buoys are used in Arctic research worldwide. The combination of pure science, applied research, education, and instrument manufacturing makes the institute unusually integrated for its size.

Students who come to SAMS to study marine science can pick degrees that include Marine Biology, Arctic Studies, or Oceanography and Marine Robotics. The campus looks straight out across the Firth of Lorn to Lismore and Mull. Boats leave from the institute's pier. The Ocean Explorer Centre, opened in 2014 by Michael Russell MSP when he was Scottish Cabinet Secretary for Education, hosts visitors and brings the research into the open. There are very few places in the world where you can do a PhD in deep-sea ecology with a view of Hebridean islands from your office window. SAMS has been a quiet anchor in Scottish science since 1884, and the dark oxygen paper is just the latest reminder that the ocean still has plenty left to teach.