The unexpected Saturday morning knock on the door sometimes engenders mild irritation, sometimes anxiety. What should I say to the well-mannered, well-groomed, youthful “elders”...
The goal of NASA’s Kepler satellite mission is to find planets that could host extraterrestrial life and possibly even intelligent life. Hundreds of “Kepler...
Extraterrestrial iron dust delivery by means of exquisitely fine-tuned processes has made modern civilization possible. Scientists sought to discern the nature of an unknown...