One of science's biggest head-scratchers - how life crawled out of a chemical soup - has a new candidate for the starring role: mineral nanozymes. Professor Yongdong Jin of Shenzhen University has proposed the "nanozymes hypothesis," arguing that primitive natural mineral nanozymes (MN-zymes), later joined by organic hybridized nanozymes, were the unsung heroes that turned inert gases into living systems.
The hypothesis suggests that under primordial Earth conditions, MN-zymes converted prehistoric gases into complex molecules through a process called "inorganic photosynthesis" - because if plants can do it with sunlight, why can't rocks do it with lava and lightning?
These microscopic mineral particles allegedly pulled off multiple jobs: catalysis, surface binding, anti-UV protection, photo-selection, and energy flow management. Essentially, they were the Swiss Army knives of prebiotic chemistry, using light, heat, and electricity to build the molecular machinery of life.
Earth itself, the theory claims, functioned as a natural "all-in-one" chemistry lab over billions of years. Pressure and temperature gradients near volcanoes and hot springs may have generated early MN-zymes, including metals, metal oxides, and sulfide nanoparticles - the same kind scientists now synthesize in labs for fun and profit.
A particularly flashy cameo in this story goes to monolayer-protected gold nanoparticles (AuNPs), which the author calls the "Au world." While gold nanoparticles are usually seen as artificial lab creations, Jin argues they could have formed naturally and stabilized by organic coatings like thiols and amines, joining the prebiotic party.
Thousands of terragrams of mineral nanoparticles already circulate through Earth's ecosystems annually, many possessing enzyme-like activity. Recent studies also show they can form spontaneously from weathering minerals in charged water microdroplets or under UV irradiation - nature's own nanoparticle factory.
The hypothesis also tackles long-standing puzzles like the water paradox, the role of micro-nano structures on Earth's surface, and the chiral origin of biomolecules. Ultimately, it aims to reconcile competing origin-of-life theories by suggesting that tiny rocks, not fancy RNA or metabolism-first scenarios, were the original architects of life.
Because apparently, life didn't just emerge from a primordial soup - it emerged from a primordial nanoparticle slurry, with a little help from volcanic heat and lightning.