← No. 018 SAT 17 OCT 2026

Ribose and glucose found in Bennu dust.

Sugars in Bennu — Asteroid Bennu

On December 2, 2025, a peer‑reviewed analysis of OSIRIS‑REx sample OREX‑800107‑108 reported two familiar sugars—ribose and glucose—along with four related sugars in dust from asteroid Bennu. Earlier studies of the same haul had found all five DNA/RNA letters and phosphates. Together they outline a fuller prebiotic toolkit that carbon‑rich asteroids can carry to young worlds.

Why it’s interesting

Fig. 018 Six sugar ring shapes branch from a Bennu fragment; the two larger forms mark ribose and glucose.

Why it’s interesting

One rock now holds sugars, nucleobases, and phosphates—the same three pieces that make up nucleotides on Earth. It tightens the link between space chemistry and the raw stock for genetic polymers, without leaping to life.

Cleanroom staff handle small sample containers and a tray in a laboratory. — Asteroid sample curation in a cleanroom. This illustrative scene shows sterile handling of returned material, like that analyzed for sugars and other organics in samples from near-Earth asteroids.

Photo: Robert Markowitz · Public domain. Cropped in social posts.

The longer version

In a Nature Geoscience study posted online December 2, 2025, researchers analyzed a milligram‑scale Bennu grain (OSIRIS‑REx sample OREX‑800107‑108) and detected six simple sugars: the five‑carbon ribose, lyxose, xylose and arabinose, and the six‑carbon glucose and galactose. This builds on earlier Bennu findings that identified all five canonical nucleobases and phosphate minerals in returned material.

To guard against contamination, the team ran procedural blanks and cross‑checked results using alternative GC–MS setups. Low abundances prevented isotopic or handedness measurements, but the detections themselves were reported as robust. Together with prior reports of nucleobases and phosphates, the sugars expand Bennu’s inventory of ingredients relevant to early prebiotic chemistry.

Edition: No. 018
Date: Saturday 17 October 2026
Subject: Sugars in Bennu
Locality: Asteroid Bennu
Period: December 2, 2025
Field: space
Evidence: 4 sources, 4 primary

See how we got here

Found after 26 research paths · Selected from 6 candidates

01 Meteorites & life Clues to organic delivery to early Earth.
02 Carbonaceous asteroids Water‑altered, organics‑rich rubble piles.
03 OSIRIS‑REx samples Bennu grains returned in 2023.
04 Bennu organics All five nucleobases and phosphates reported, 2024–2025.
05 Sugars in Bennu Ribose and glucose detected on Dec 2, 2025.
→ Ribose and glucose found in Bennu dust.

Sources

Nothing publishes without independent sources. How we verify →

1
Bio-essential sugars in samples from asteroid Bennu
Nature Geoscience (Springer Nature) · 2025 · peer reviewed Primary

Primary report of aldopentoses (incl. ribose) and aldohexoses (incl. glucose) detected in Bennu; also states nucleobases and phosphate were previously found in Bennu samples.

nature.com
2
Abundant ammonia and nitrogen‑rich soluble organic matter in samples from asteroid (101955) Bennu
Nature Astronomy (Springer Nature) · 2025 · peer reviewed Primary

Primary report identifying N‑heterocycles including all five canonical nucleobases in Bennu samples.

doi.org
3
Asteroid (101955) Bennu in the laboratory: Properties of the sample collected by OSIRIS‑REx
Wiley / Meteoritics & Planetary Science · 2024 · peer reviewed Primary

Primary report documenting phosphate phases (e.g., Mg,Na‑phosphate; magnesium hydrogen phosphate trihydrate) in returned Bennu material.

onlinelibrary.wiley.com
4
Prebiotic organic compounds in samples of asteroid Bennu indicate heterogeneous aqueous alteration
Proceedings of the National Academy of Sciences (PNAS) · 2025 · peer reviewed Primary

Additional primary analysis confirming diverse organics in Bennu including the five canonical nucleobases.

pnas.org

Take it with you Challenge a friend ↗ Square Story Wide Permanent link