A chunk of the Murchison meteorite sat in a Chicago museum for decades, unassuming and grey, holding secrets older than the Earth itself. When Joseph Frye-Jones finally crushed and dissolved a fragment, the world's most powerful mass spectrometer found tens of thousands of carbon-based molecules hidden inside — a chemical treasure chest far richer than anyone expected.
Murchison fell to Earth in Australia back in 1969, a space rock at least 5.5 billion years old. That makes it about a billion years older than our planet. When Frye-Jones, a graduate research assistant at Florida State University, placed a piece of it — loaned by Chicago's Field Museum — into the record-setting 21-tesla FT-ICR spectrometer at the National High Magnetic Field Laboratory in Florida, the results were staggering. The meteorite matched the chemical complexity of petroleum deposits, some of the most intricate mixtures ever analyzed on Earth.
He got a second rock too: a fragment of the Aguas Zarcas meteorite, which fell in Costa Rica in 2019, provided by the Buseck Center for Meteorite Studies at Arizona State University. The two rocks belong to the same cosmic family and look almost identical on the surface. But their chemical fingerprints could hardly be more different, sharing only a tiny fraction of complex molecules.
That surprise matters. It tells scientists that space is not uniform — that different asteroids formed in radically different environments, and that the young solar system cooked up a vast, diverse organic chemistry. "It is giving us a glimpse at the origins of our planet and solar system," Frye-Jones said. The findings were published in The Planetary Science Journal.
Much of the earlier work on Murchison happened right after it landed, more than half a century ago. Since then, technology has leapt forward, and Frye-Jones used those sharper tools to look far deeper than anyone could before. "With the highest-resolution mass spectrometer in the world, we can look at things that others cannot," he said.
Mass spectrometry can tell you a molecule's chemical formula, but the same formula can fold into many different shapes. So the MagLab teamed up with physicist Percy Zahl at Brookhaven National Laboratory, who used a technique called high-resolution noncontact atomic force microscopy to actually picture the structures of individual extraterrestrial molecules — hovering an ultra-fine probe over them to map their shapes.
Taken together, the work suggests that the chemical building blocks of life are deeply woven into the fabric of the universe, not rare accidents. That broadens our understanding of the cosmic ingredients that rained down on early Earth, potentially helping to spark life as we know it. And it hints that somewhere out in space, perhaps on distant worlds we have yet to meet, the same complex chemistry could be quietly getting started.