For four decades, many SETI experiments have focused on finding sharp spikes in frequency but the new study says signals may not stay narrow as they travel away from their home system.

“The universe is not as quiet as we were told.” The line belongs to a dramatic retelling of a disputed signal claim, but it captures a sober scientific problem: the first technosignature humanity ...

Stellar plasma can smear alien radio signals before they escape their star system, making them harder for astronomers to detect.

SETI has spent decades listening for a sharp, well-defined radio signal that could indicate it was sent by distant intelligent life. Now researchers believe that space weather could distort and blur s ...

A study by alien searchers at the SETI Institute (Search for Extraterrestrial Intelligence) could explain why humanity has ...

For over six decades, the Search for Extraterrestrial Intelligence (SETI) has been tirelessly scanning the cosmos for signs ...

2023年、火星から地球に向けて暗号化された「エイリアン・メッセージ」が送信された。それから1年半、アマチュア科学者である父と娘が、ついにその解読に成功したそうだ。 じつはこれ「A Sign in Space」と呼ばれるSETI研究所の実験的なプロジェクトとして ...

If advanced aliens lived on a planet within a few hundred to a thousand light years away from Earth, then vast numbers of their signals must already have crossed Earth without being noticed, a new ...