The Yeast That Could Survive Mars: IISc Scientists Unlock New Clues to Life Beyond Earth

Bengaluru:
In an unusual twist to the story of life, Indian scientists have found that the same yeast that helps make our daily bread and beer might one day help answer one of humanity’s biggest questions—can life exist on Mars?

Researchers from the Indian Institute of Science (IISc), Bengaluru, and the Physical Research Laboratory (PRL), Ahmedabad, have shown that Saccharomyces cerevisiae—the common baker’s yeast—can survive extreme conditions similar to those found on the Red Planet. Their study could change how scientists think about the limits of life and its survival in space.

Testing yeast in Martian conditions
The scientists recreated some of Mars’s harshest conditions in the lab. They exposed the yeast to shock waves moving at five times the speed of sound (Mach 5.6), simulating the kind of force that a meteorite impact would create. They also treated it with sodium perchlorate, a highly toxic salt found in Martian soil that can destroy most living cells.

Despite this double assault, the yeast did not die. It survived, though its growth slowed down. What surprised the researchers most was how the yeast cells protected themselves from damage.

The secret of survival: RNP condensates
Under the microscope, the yeast showed a fascinating ability to form tiny droplet-like structures called ribonucleoprotein (RNP) condensates. These are protective compartments inside cells that gather and reorganize genetic material during times of stress.

By doing this, the yeast can pause its normal activity, repair itself, and resume growth once conditions improve. Scientists believe this ability could be one of the keys to survival in extreme environments—not only on Mars but in other parts of the universe as well.

A window into astrobiology
The study combines physics, chemistry, and biology in a rare way. By firing high-speed shock waves at living cells and studying how they respond, the researchers are helping build a clearer picture of what life might need to survive on other planets.

It also highlights how simple organisms like yeast can act as models for studying complex biological questions. If yeast can endure such punishment and still live, it opens up new discussions about how early life might have traveled across planets, hidden within meteorites—a theory known as panspermia.

Not proof of Martian life, but a big clue
The scientists caution that their findings don’t mean life exists on Mars. Mars has many other challenges—deadly radiation, freezing nights, thin air, and lack of liquid water. But the yeast’s survival offers hope that life’s building blocks are more resilient than we thought.

This research could also help space missions that rely on biological systems, such as growing food in controlled environments or developing microbes to recycle waste in space.

India’s growing role in space biology
With this study, IISc and PRL join a small group of institutions worldwide exploring astrobiology—the science of life in space. It marks another step forward for India’s expanding space research efforts, connecting Earth’s smallest organisms to the vast possibilities of the cosmos.