• chief scientist Ellen ##son believes we 're close to finding alien bodies . Indications within a decade ; definitive ##s within ` ` 20 to 30 years , '' she said . Finding information on other celestial bodies is key to determination .
NASA chief scientist Ellen Stofan believes we 're close to finding alien life . Indications within a decade ; definitive evidence within `` 20 to 30 years , '' she said . Finding water on other celestial bodies is key to determination .