Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures?

Government officials have said little about Trump’s most recent social media post on the matter. The president cited “tremendous interest” in the files, whatever they might contain. Perhaps the most ...

Shaped by a different biology or culture, other intelligent civilisations – if they’re out there – might understand the ...

President Donald Trump criticized Barack Obama for his comments on aliens. Then, he said we should release more files. Joe Biden signed disclosure bill.