Word Formation_Discoveries

Many people believe in the _____ of aliens. EXIST

However, until now, nobody has produced any ______ that intelligent life exists anywhere but on Earth. PROVE.

Many planets are boiling hot or freezing cold and are completely ____ to sustain life. SUIT

Sadly, it is _____ that there is intelligent life on any other planet in our galaxy. LIKELY

People often claim to have seen UFOs but there may be a simple ______ for this. EXPLAIN

However, it seems _______ probable that we will discover life in other galaxies one day. INCREASE