Global Scans · Extraterrestrial · Weekly Summary

A global catastrophic risk is a hypothetical future event that has the potential to damage human well-being on a global scale. Some events could cripple or destroy modern civilization. Any event that could cause human extinction is known as an existential risk.

• [New] For decades, SETI scientists have searched for narrow spikes in radio frequencies that could indicate the presence of advanced technology. ScienceDaily
• [New] The sheer volume of projects making use of radio astronomy for reasons beyond SETI is one of the reasons information about extraterrestrials might be more likely to leak than stay a secret. Scientific American

Last updated: 21 June 2026