> Realistically, though, it's too much of a coincidence that such a probe would first arrive so soon after we gained the ability to conceive of it. Alternately

> Realistically, though, it's too much of a coincidence that such a probe would first arrive so soon after we gained the ability to conceive of it. Alternately, this implies that we're visited all the time, but usually by robotic probes flying through the solar system for brief visits before being disposed of responsibly and cleanly.