Plate Nº 88 · recorded September 30, 2026

Chemistry & MaterialsReported finding

Meteorite Sugar May Have Shaped Early Earth's Chemistry

Ribose delivered by meteorites may have kept boron dissolved in Earth's early waters, protecting the sugar needed for RNA — a two-way chemical partnership predating life.

By Priya Raman4 min read737 words

In brief

  1. The study, published in Scientific Reports (2026), found that ribose helps borate minerals dissolve and prevents solid grains from forming, keeping more boron available in water.
  2. Borate protects ribose — the fragile sugar in RNA's backbone — from breaking down when heated, creating a two-way survival partnership between the sugar and the mineral.
  3. Meteorites may have delivered around a million tons of carbon to Earth per year roughly four billion years ago; scientists found ribose in the Murchison meteorite that fell in Victoria, Australia, in 1969.

A fragile sugar delivered to Earth by meteorites may have done more than arrive here — it may have helped create the very conditions that allowed it to survive. That is the central finding of a new study published in Scientific Reports, which suggests a two-way chemical partnership on the prebiotic planet: borate minerals protected the sugar ribose from breaking down, while ribose in turn kept boron dissolved in water, where it remained available for the reactions that may have led to life.

Why ribose matters

RNA, the molecule that stores and uses genetic information in modern organisms and likely played a central role in life's origin, does not form easily. Its molecular backbone contains ribose, a sugar that is remarkably unstable. When heated, ribose breaks down into brown goop, much as table sugar turns into caramel.

Boron offers a solution. In the form of borate — a molecule containing boron, oxygen and hydrogen — it binds to ribose and prevents it from decomposing. But this raised a long-standing puzzle for origin-of-life researchers: boron-containing minerals dissolve poorly in water. They tend to precipitate into crystals, leaving little boron behind in solution.

The question was whether ancient environments could ever have held enough dissolved boron to matter.

Clues from Himalayan hot springs

The research team, led by Luke H. Steller, studies modern environments that may resemble places where life began. One is the Puga hot spring field, high in the Himalayas in India. There, the waters contain so much boron that borate salt crusts crunch underfoot like snow. Yet even these waters hold only a few percent of the boron concentration used in some laboratory experiments based on purified ingredients.

For the new study, the researchers ran experiments with real minerals, including borate crusts collected at Puga. The results showed that ribose helps borate minerals dissolve and inhibits the formation of solid grains. More boron stays in the water, available for chemical reactions.

This creates what the authors describe as a two-way relationship: borate protects ribose from breakdown, and ribose keeps borate dissolved and mobile. It is a self-reinforcing loop in which each partner secures the other's survival.

A sky full of sugar

Four billion years ago, when life is thought to have first formed, Earth looked nothing like today. The atmosphere held little oxygen, volcanism was far more active, and green, iron-rich oceans covered sparse volcanic landscapes. Meteorites from the young solar system bombarded the land, delivering water and carbon compounds from space.

Researchers estimate that around a million tons of carbon could have arrived each year during this early bombardment. The Murchison meteorite, which fell in Victoria, Australia, in 1969, hints at what that material contained. Locals who collected its fragments reported a strong kerosene-like smell from its carbon-containing compounds. Scientists have since identified ribose among its contents, alongside other sugars.

With no microbes around to consume them, these molecules could accumulate wherever supply outpaced chemical breakdown. Evaporation in shallow lakes and pools may have concentrated them into rich chemical soups.

The soup shapes the rocks

Much origin-of-life research asks how minerals helped primordial chemistry become more complex. This study flips the perspective: the soup itself affected the minerals. Some boron that would otherwise have crystallized into crusts and been buried could have stayed dissolved in primordial waters, potentially changing which minerals formed at Earth's surface.

The findings come with clear limits. Ribose itself was probably rare on early Earth. The experiments focused on a single sugar, and other molecules that also bind borate — such as ethylene glycol and glycerol — still need testing against natural mineral deposits. More abundant rock components, including silica and calcium, also interact with carbon molecules, suggesting primordial soups could have influenced other mineral formations too.

Still, the implication is intriguing. Today, organisms shape geology by building shells and coral skeletons through biomineralization. The authors propose that nonliving carbon molecules may have begun influencing mineral formation even before life existed.

Whether these interactions reshaped entire landscapes remains an open question. But studying them, the researchers argue, helps scientists test assumptions about an alien world in our own distant past, refine origin-of-life experiments, and better understand where else in the universe life might emerge.

Publication details: Luke H. Steller et al., "The influence of ribose on borate mineral solubility," Scientific Reports (2026). DOI: 10.1038/s41598-026-70700-5

via Phys.org Space & Astronomy (Source)

Filed under

  • origin-of-life
  • astrochemistry
  • ribose
  • borate-minerals
  • meteorites
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Priya Raman

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Senior reporter covering industry trends and analytics at SciBeat.

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