Archaeologists have long known that complex societies can rise, flourish and then disappear so completely that only scattered ruins hint at what was lost. Now a new wave of research is sharpening the ...

Global temperature increases over the past thirty years, visualized. Credit: NOAA/NCEI Earth's average global temperatures have been steadily increasing since the Industrial Revolution. According to ...

Recent research suggests that galaxies with high radio emissions—known as “radio-bright” galaxies—could be home to alien civilizations. This idea, explored in Brian C. Lacki’s study Artificial ...

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For decades, the search for extraterrestrial intelligence has largely been predicated on a specific assumption: that advanced civilizations will inevitably grow, expanding their energy consumption and ...