Imagine that intelligent alien life exists, that its discovered humanity, and that it has the technology to reach us. What would first contact between humanity and aliens be like?
In the first post in this series I looked at the idea that advanced alien civilisations might be totally indifferent to our existence and would simply choose to ignore us.
In the other scenarios in this series I’ll assume that they are interested in us, and in this post, that they arrive on Earth, but in a rather covert fashion.