half life calc

Do you think there is life on Europa? If so what type of life, bacteria, fish, human, intelligent life, Kardashev type 1, 2,...

well, the universe is so vast that maybe there may be life like us humans in other galaxies...

This question just popped in to my mind. Who thinks that there is life on other planets not in the milkyway?!? I have wondere...

Does anyone believe that aleins started life on Earth by sending bacteria to Earth purposely or accidentally and that this st...

Have researchers found another Earth, or do you think it's just another lifeless rock? Read about it: http://funadvice.com/r...

Is their any possibility or has their been any possibility of life in the solar system in the past, or any known places that ...

Are there people who are already born who may live to be 1,000?

I was watching Star Wars and i saw the meeting of all the senators from the galaxy. It was like, one per planet. And i though...

I need some scientific theories of the origin of life for an essay in biology! pleaseee help! the more you know the best! t...

So do you think there is another life form out there some where in space?