http://www.cnn.com/videos/tech/2015/04/08/bts-nasa-proof-of-alien-life-in-20-years-new.nasa

NASA: Proof of alien life in 20 years

Source: NASA

Added on 11:39 AM ET, Wed April 8, 2015

A chief NASA scientist predicts that we will have "definitive evidence" of life outside our planet in 20-30 years.

Amazing Outer Space (16)

Meet the Mars One candidates

Hundreds more worlds in our solar system?

Fireball spotted over Pennsylvania

NASA to send submarine into space

Timelapse reveals dramatic solar images

Group aims to land on Mars by 2025

Neil Armstrong kept all these in his closet

Powerful new 'mega-rocket' unveiled

NASA: Proof of alien life in 20 years

Asteroid to orbit Earth's moon?

What happens during a year in space?

What a solar eclipse looks like from the moon

                                                                 

NEW HOME by Tracy Huang