Sounds like an interesting documentary coming out. It's an interesting viewpoint from him making a visit from Extra terrestrials more like "Independence Day" than a peaceful mission.
I doubt it is anything we will ever experience in our lifetimes but I am very interested to see the documenary and hear his thoughts.
"The 68-year-old scientist says a visit by extraterrestrials to Earth would be like Christopher Columbus arriving in the Americas, "which didn't turn out very well for the native Americans." He speculates most extraterrestial life will be similar to microbes, or small animals - but adds advanced lifeforms may be "nomads, looking to conquer and colonise."
http://cnews.canoe.ca/CNEWS/Science/...713451-ap.html