some researchers said aliens probably weigh more than 650 lbs ( 300 kg ) Calculations based on evidence that there ’ s a minimum size for intelligent life . Larger aliens are more likely to survive long enough to make advanced tech . minimum size does n't factor in gravity or an alien planet 's gravity .
Fergus Simpson said aliens probably weigh more than 650 lbs ( 300kg ) Calculations based on idea that there ’ s a minimum size for intelligent life . Larger aliens are more likely to live long enough to make advanced tech . Estimated size does n't factor in evolution or an alien planet 's gravity .