Aarva

Quanta Magazine ·Behind the news

An Early Step on the Long, Strange Road to Photosynthesis

by Carrie Arnold

Published 2026-06-10 14:57:19+00:00

Where do you look for the very first cell that learned to turn sunlight into sugar?

0:00 / 16:32 · Narrator Gacrux

Context

A microscopic green speck scraped from a leaf in Panama is helping scientists answer one of biology's oldest questions. In a Quanta Magazine piece published on 10 June 2026, researchers use this organism to ask exactly how life first learned to turn sunlight into sugar. Because modern photosynthesis is a wildly complicated chemical engine, figuring out how it originally formed has mostly been guesswork. But this newly discovered bacterium acts as a two-billion-year-old time capsule, offering a rare look at the primitive machinery that eventually filled the atmosphere with oxygen.

Show notes

An analysis of a recently identified strain of cyanobacteria that split from other photosynthetic life over a billion years ago. By mapping the microbe's unusual light-harvesting structures and stable core proteins, researchers are reconstructing the origins of photosynthesis. The biological data provides a physical record of how single-celled organisms first developed the machinery to turn sunlight into energy.

Read on Quanta Magazine →