The microorganisms living in Río Tinto’s hyper-acidic waters are already changing the way we do laundry. Most people just don’t know it yet.
Recently, Prof. Irene Sánchez Andrea and Antonio García-Moyano appeared on Vive! Radio Segovia. They joined the morning programme to talk about EXPLORA, XTREAM, and what European science funding looks like in practice. The result was 30 minutes of accessible science — the kind that makes you look at everyday objects a little differently.
A shared origin story
What the radio hosts didn’t initially know is that Irene and Antonio share a scientific history that predates both projects. Both completed their PhDs in the same Madrid laboratory. Their supervisor was Ricardo Amils — a researcher who has spent over 35 years studying the Río Tinto ecosystem in Huelva. Both researchers were captivated by the same extreme environment. Then their paths diverged: Irene moved to the Netherlands, Antonio to Norway.
When the European Commission launched a competitive call on extreme environments and biotechnological applications, both applied independently — and both won. They discovered afterwards that they were the two selected projects from that call. The Segovian connection, as Irene explained during the interview, came later.
What is an extremophile?
Irene pointed out that the word itself reveals a human bias. We call these organisms “extremophiles” — lovers of extremes — but from their perspective, nothing about their environment is extreme at all.
A microorganism that evolved over millions of years in water with a pH of 1 doesn’t experience that as hostile. It’s simply home. Río Tinto’s water, for context, is more acidic than your stomach and more acidic than lemon juice.
What makes extremophiles scientifically interesting is what that adaptation requires. To thrive in conditions that would kill most known life, these organisms develop highly specialised enzymes and compounds. Those compounds have remarkable real-world applications.
The science in your laundry and your COVID test
The cold-water laundry cycle is one of the clearest examples. When you wash at 20°C and your clothes come out clean, you benefit from enzymes derived from cold-adapted extremophiles. These organisms evolved in sub-zero environments. They developed the ability to work efficiently at low temperatures. As a result, they replace the need to heat water to 60°C. Every energy-efficient wash cycle owes something to extremophile research.
The other example became unexpectedly familiar during the COVID-19 pandemic: the PCR test. The enzyme that makes PCR work was isolated from a microorganism living in a thermal pool in Yellowstone National Park. It functions at 70°C. Without that discovery, rapid diagnostic testing would not exist as we know it.
Two projects, different environments, shared goals
EXPLORA focuses on two field sites. The first is the acidic waters of Río Tinto in Huelva. The second is the polar ecosystems of Antarctica. From Río Tinto, the project investigates microorganisms that degrade plastic under acidic conditions and a compound with potential as an anticancer agent. From Antarctica, researchers focus on antimicrobial and antioxidant compounds from cold-adapted microorganisms.
XTREAM covers a broader range of extreme aquatic environments, with its own set of biotechnological targets. Both projects were funded under the same European Commission call. That call explicitly linked extreme environments to four categories of biotechnological compounds. Each consortium then chose its own approach within that framework.
One shared challenge is that many of these microorganisms cannot be cultured in a laboratory. Replicating the conditions they need — the right pH, temperature, and mineral concentrations — is often impossible. So researchers work with genetic material directly. They collect water or soil samples from the field, extract all the DNA present, and analyse it computationally. The genome encodes everything the organism does and everything it has evolved to produce.
What happens after four years?
Neither EXPLORA nor XTREAM aims to deliver a market-ready product by the end of its funding period. Both projects work toward the middle range of the Technology Readiness Level scale. They develop and validate methodologies that bring biotechnological applications closer to commercial viability.
As Antonio explained during the broadcast, the European Commission designs its funding architecture with this progression in mind. Different calls target different stages of readiness. Companies engage once a technology has been sufficiently de-risked. Some research-committed companies begin even earlier. The pipeline from discovery to application is long — but it is well mapped.
Why this conversation mattered
Public outreach is not a box to tick in a Horizon Europe project. It is a genuine obligation. These projects use public money. Explaining their value to a non-specialist audience is part of the work.
As Antonio said during the interview, every time researchers explain what they do in plain language, they justify that investment. A 30-minute radio programme in Segovia — reaching a general local audience with no prior knowledge of extremophiles — does exactly that. It is direct, conversational, and grounded in examples people recognise: laundry, PCR tests, wastewater treatment, and a red river in Huelva that looks like it belongs on another planet.
That last point is not just poetic. NASA studies Río Tinto as an analogue for conditions on Mars. The link between extremophile research and astrobiology runs through the same environments EXPLORA investigates. If life exists elsewhere in the solar system, it almost certainly resembles a Río Tinto microorganism more than anything we would recognise.
EXPLORA will keep bringing its research to audiences beyond academia. The science is too interesting — and the stakes too high — to keep it in the lab.
Listen to the full interview on Spotify: https://open.spotify.com/episode/2OUJhYvLXr8r0zRDt1BTSU
