by Dr. Gregory Baiden
NASA’s announcement that its Perseverance rover has discovered a potential biosignature in a rock sample taken in the Jezero Crater on Mars represents the closest we have ever come to confirming ancient life beyond Earth. Taken from a rock named “Cheyava Falls” last year, the “Sapphire Canyon” sample contains minerals formed through reactions between organic matter and iron compounds. According to NASA, this could preserve evidence of microbial metabolism from billions of years ago.
The Cheyava Falls discovery is particularly significant because it comes from relatively young sedimentary rocks, suggesting Mars remained habitable later in its history than previously thought. The samples contain a distinctive pattern of minerals dubbed “leopard spots,” which carry two iron-rich minerals: vivianite and greigite – minerals associated with microbial activity on Earth. Yet few realize this discovery has roots in a Canadian mine.
The sample was collected from sedimentary rocks accessed using Perseverance’s onboard drills. That drilling capability exists today because of a demonstration that took place in Sudbury, Ontario, in the mid-1990s.
A NASA delegation traveled to Inco Limited to determine whether drilling could be controlled remotely in hostile environments – a critical requirement for planetary exploration.
As Inco’s then Global Head of Strategic Mining Research & Innovation, I led that demonstration. NASA officials witnessed three separate uphole drills being operated from surface control stations, proving that teleoperated drilling was not theoretical but operational.
For NASA, this was decisive. The inclusion of drills on its Mars rovers was far from guaranteed at that time. The Sudbury demonstration showed it could be done, directly influencing NASA’s decision to equip Perseverance and its forerunner, Curiosity, with subsurface drilling systems.
The payoff has been profound. These drills have uncovered organic molecules, isotopic signatures, hydrated minerals, and now, potential biosignatures – compelling evidence that Mars once supported conditions favorable to life. Today, as the world stands closer than ever to confirming that life once existed beyond Earth, we can trace this breakthrough, at least in part, back through Sudbury’s tunnels.
My work with Inco extended beyond that pivotal demonstration. As the Canadian Research Chair in Robotics and Mine Automation, I collaborated with both the Canadian Space Agency and NASA to define strategies for lunar mining and in-situ resource utilization. The same technologies that proved vital for Mars exploration – remote drilling, tele-robotics, and autonomous systems – will be central to plans for sustained extraterrestrial human presence, whether on the Moon or, eventually, Mars.
As we await the Mars Sample Return mission, which will bring cores back to Earth for definitive analysis, it is worth remembering that the road to this moment ran through Sudbury’s tunnels. The mining expertise developed in Canada’s challenging underground environments did not just advance terrestrial resource extraction – it opened a pathway to answering one of science’s greatest quests.