Answer: The Rorschach test
Answer: The Troposphere
An octopus has two eyes and four pairs of arms... it is bilaterally symmetric. It has a beak, with its mouth at the center point of the arms.
Portman collaborated (using her birth name, Natalie Hershlag) with Abigail A. Baird, who has a collaboration path (Gazzaniga, Michael S. -> Victor, Jonathan D.) leading to Joseph Gillis, who has an Erdős number of 1.