NASA hosted a panel discussion with many of its high-ranking scientists on April 7th regarding the possibility of discovering signs of alien life within the 21st century. The consensus the NASA officials put forth was overwhelmingly optimistic in this regard: Not only will we discover alien life in this century, but we’ll discover it in the next 20 years.
Meaning... my theoretical grandchildren could grow up in a world where alien life is a historical fact.
What makes NASA so sure of this time frame? Three reasons. Or rather, three missions that will launch in the next 10 years that will bridge the gap between theories of alien life and evidence of alien life.