---
title: "The Wow! Signal: 72 Seconds That Changed the Search for Extraterrestrial Life"
description: "On August 15, 1977, a radio telescope in Ohio detected a narrowband transmission so remarkable that the astronomer on duty circled it and wrote a single word. Nearly five decades later, it has never been explained."
url: https://decodingtheunknown.pub/article/the-wow-signal.md
canonical: https://decodingtheunknown.pub/article/the-wow-signal
datePublished: 2026-05-12T00:00:00.000Z
dateModified: 2026-05-12T00:00:00.000Z
author:
  - name: Simon Whistler
    url: https://decodingtheunknown.pub/author/simon-whistler
publisher: Decoding the Unknown
image: "https://images.unsplash.com/photo-1610457642191-05328cdf34ff?w=1200&q=80"
type: Article
contentHash: e1ed8b2a0da43944f9e7a24bbe4bcdddf37333273aca48c32ec966674024eb37
tokens: 54
summaryUrl: https://decodingtheunknown.pub/article/the-wow-signal.md.summary.md
---

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On August 15, 1977, a radio telescope in Ohio detected a narrowband transmission so remarkable that the astronomer on duty circled it and wrote a single word. Nearly five decades later, it has never been explained.
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