Why Do Aliens Always Look Human?

Spend enough time in Hollywood sci-fi and you might start to believe all intelligent life in the universe shares our basic blueprint—two arms, two legs, one face. The "Star Trek" and "Star Wars" franchises have leaned on this formula for decades, partly for practical filmmaking reasons, and partly because relatability sells.

But "Project Hail Mary" changed the conversation. Ryan Gosling's alien companion Rocky—named for his stone-like skin—has five multi-purpose limbs, no face, and no eyes. He perceives the world through echolocation, and his combined mouth/anus sits on his underside, not unlike a starfish. Watching him eat is, reportedly, not for the faint of heart.

A Roster of Truly Alien Aliens

Rocky is not alone in sci-fi history. Non-humanoid intelligent beings have appeared across film and television for decades, each pushing the boundaries of what an alien mind might inhabit.

The Heptapods of Arrival communicate through circular ink pictograms and perceive time non-linearly. The 456 of Torchwood: Children of Earth hide in mist, ooze green toxins, and harvest children for chemical highs. The Medusans of Star Trek have shed their bodies entirely, existing as formless hive minds whose mere appearance causes madness in the corporeal.

Starro from The Suicide Squad resembles a giant starfish with a single eye, capable of kaiju-scale destruction and mind control via its own spores. The Rigellians Kang and Kodos from The Simpsons—five tentacles, one enormous eye, constant drool—take a more comedic approach to alien physiognomy.

Why It Matters

Non-humanoid aliens are more than a visual novelty. They pose a genuine philosophical challenge: if intelligence can arise in a body nothing like ours, what does that mean for how we perceive, communicate, and understand the universe?

Project Hail Mary author Andy Weir has stated he based Rocky's biology on real astrobiological principles. Life adapts to its environment; there is no cosmic law mandating bipedal symmetry.

As CGI technology removes the practical barriers that once forced filmmakers toward humanoid designs, the door is opening wider for truly alien aliens to take center stage on screen.