It's actually been settled science for over 40 years at this point. Here's Carl Sagan laying it out to Congress in 1985 https://youtu.be/Wp-WiNXH6hI
It's actually been settled science for over 40 years at this point. Here's Carl Sagan laying it out to Congress in 1985 https://youtu.be/Wp-WiNXH6hI