Neil DeGrasse Tyson "The closest thing to aliens on Earth is the octopus"They break almost every rule of biology: three hearts, blue blood, and nine brains with eight mini-brains in their arms that can taste, touch, and make decisions independently.They edit their own RNA, regrow lost arms in months, change color and texture instantly, and squeeze through holes the size of a quarter with no bones.Their lineage split from ours 600 million years ago.Maybe the real aliens were right beneath us this