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Articles on National security

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Solar engineering is designed to reflect some of the Sun’s ray back into space. John Crouch/Moment via Getty Imgaes

Climate engineering carries serious national security risks − countries facing extreme heat may try it anyway, and the world needs to be prepared

The big question: Would climate engineering like sending reflective particles into the stratosphere or brightening clouds help reduce the national security risks of climate change or make them worse?
UFOs usually have non-extraterrestrial origins, but many have urged the government to be more transparent about UFO data. Westend61/Westend61 via Getty Images

Are we alone in the universe? 4 essential reads on potential contact with aliens

Whistleblower allegations that the government possesses UFOs may not be backed up by public physical evidence, but some argue that listening for extraterrestrial life is the first phase of contact.

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