Statistically we shouldn't be the only planet with life on it. But we might very well be the only planet with intelligent* life on it because theoretically life on earth evolved completely by accident.
There never has been evidence for life originating outside of earth. But due to the sheer number of ro ky Earth Like planets in the Goldilocks Zone of their respective systems with similar conditions to that on Earth it can be assumed that life exists else where. Although we don't know how common life is because we've never seen it outside of our system. We especially don't know the probability of 'intelligent' life as we believe that's it's even less common due to it frequency on our planet. Also Neil Degrassi Tyson never said that.
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