1: ( CNN ) They may not be  Star Trek  - type extraterrestrials , but we may be close to finding evidence of alien life , a NASA scientist says . 2:  I think we 're going to have strong indications of life beyond Earth within a decade , and I think we 're going to have definitive evidence within 20 to 30 years ,  NASA chief scientist Ellen Stofan said Tuesday during a panel discussion on water in the universe . 3: NASA chief scientist Ellen Stofan believes we 're close to finding alien life .
1: a NASA scientist 2: NASA chief scientist Ellen Stofan 3: NASA chief scientist Ellen Stofan