# Google Research — A connectomics milestone: Mapping the complete male fruit fly brain

- Company: Google Research (research.google)
- Announced: 2026-09-03T16:00:03+00:00
- Category: research-paper
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://research.google/blog/a-connectomics-milestone-mapping-the-complete-male-fruit-fly-brain/
- Record: https://forck.live/items/8054-a-connectomics-milestone-mapping-the-complete-male-fruit-fly-brain
- Subject: Research

Google Research, in partnership with HHMI Janelia and collaborators, published a complete wiring diagram of the male fruit fly's brain and central nervous system in Cell. The map contains over 166,000 neurons and 125 million synaptic connections, making it the largest brain map by number of neurons to date.

## Evidence

Verbatim from https://research.google/blog/a-connectomics-milestone-mapping-the-complete-male-fruit-fly-brain/:

> Published in Cell , “ Sexual dimorphism in the complete connectome of the Drosophila male central nervous system ”, is the result of a decade-long partnership that advances the field of connectomics using computing and AI to build cellular-scale maps of entire brains. With over 166,000 neurons and 125 million synaptic connections, this is the largest brain map by number of neurons to date

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Record: https://forck.live/items/8054-a-connectomics-milestone-mapping-the-complete-male-fruit-fly-brain
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