So, could researchers find clear evidence that an ancient species built a relatively short-lived industrial civilization long before our own? Perhaps, for example, some early mammal rose briefly to civilization building during the Paleocene epoch about 60 million years ago. There are fossils, of course. But the fraction of life that gets fossilized is always minuscule and varies a lot depending on time and habitat. It would be easy, therefore, to miss an industrial civilization that only lasted 100,000 years—which would be 500 times longer than our industrial civilization has made it so far.
Recipes inspired by The Left Hand Of Darkness.
I mostly stuck to Le Guin’s world-building rules for Winter, which were “no large meat-animals … and no mammalian products, milk, butter or cheese; the only high-protein, high-carbohydrate foods are the various kinds of eggs, fish, nuts and Hainish grains.” I did, however, add some hot-climate items found in Manhattan’s Chinatown for their space-age looks and good flavors (dragonfruit, pomelo, galangal, chilis, and kaffir limes).
Serve with hot beer.
Churchill, as it turns out, had some pretty solid ideas on SETI.
Churchill was a science enthusiast and advocate, but he also contemplated important scientific questions in the context of human values. Particularly given today’s political landscape, elected leaders should heed Churchill’s example: appoint permanent science advisers and make good use of them.
A free PDF download from NASA on all things SETI, specifically the challenges of interspecies interstellar communication.