We search for intelligent life in the universe most effectively by
A) sending out spacecraft with messages on them.
B) using radio telescopes to search for radio signals.
C) monitoring ultraviolet radiation emitted by stars.
D) sending spacecraft to explore other worlds.
E) all of the above

Question

Quizplus · Accepted Answer

Using radio telescopes to search for radio signals is the most effective method because intelligent civilizations might use radio waves for communication, which can travel vast distances across space.

We Search for Intelligent Life in the Universe Most Effectively