Are we alone in the universe? It's one of life's biggest mysteries and one that is explored by science fiction and scientists alike. But if there is alien life on other planets, what might it look like?
While little green men or towering predators are the stereotypical depictions of extraterrestrials in film, any aliens that might be out there are unlikely to resemble those characters, experts told Live Science. Instead, the unique environment of the moons or exoplanets that these aliens call home could make their physiology completely different from anything found on Earth.
