Scientists Confirm First True Sugar, Erythrulose, in an Interstellar Cloud

Overview

• Researchers report in Nature Astronomy that radio observations from Spain’s Yebes 40m and IRAM 30m telescopes matched twelve laboratory spectral lines to identify the four‑carbon sugar eritrulose in the molecular cloud G+0,693-0,027.
• The paper, published July 13, 2026, also catalogs more than 180 other molecules in the same cloud, which gave the team greater confidence that the spectral lines were correctly assigned to eritrulose.
• Authors estimate that between 0.5 million and 50 million tonnes of eritrulose could have been delivered to early Earth during the Late Heavy Bombardment, a model‑dependent figure that does not by itself prove a role in the origin of life.
• External astrochemists have called the detection robust because it uses multi‑line matches and lab cross‑validation, but scientists stress caution about linking the finding directly to life’s origin and say targeted searches for ribose and deoxyribose are now priorities.
• The result shows that icy grains and simple precursors in chemically rich clouds can build complex organics in space, which raises the prospect that similar molecules are widespread and may be delivered to other young planets by comets and asteroids.