Yes, it is the only planet found so far.
So far, Earth is the only planet known to harbor life, much less intelligent varieties of it.
So far, Earth is the only planet we know of that has intelligent life.
Earth, we think. This is sometimes a point of dispute.
Yes! Life could be found on planet earth!
The only one that humans are currently aware of is Earth. No other planet in our own solar system has intelligent life, and there is no conclusive evidence as of yet that intelligent life exists elsewhere.
Originating, located, or occurring outside Earth or its atmosphere: intelligent extraterrestrial life Originating, located, or occurring outside Earth or its atmosphere: intelligent extraterrestrial life
No. Not yet.
Life
None (intelligent or otherwise) has been positively identified except on Earth.
Until further proof, an atmosphere that can produce and support intelligent life
It is the only place in the known universe that has been verified to contain intelligent life.
Of course. ___________________ ...no intelligent life that Spock and I have ever observed. Scotty-- beam us up. Look around you...