Cambridge University zoologist Arik Kershenbaum speculates on the form and function of alien life in his 2020 book, "The Zoologist's Guide to the Galaxy[1]." No time to read a book? Watch his Harvard science book talk[2].

[1] https://en.wikipedia.org/wiki/The_Zoologist%27s_Guide_to_the...

[2] https://youtu.be/t4g0wHS2XKM