Silicon-Based Life: Fact or Fiction?

Some scientists—and plenty of science fiction—have speculated about the possibility of silicon-based life. While silicon is chemically similar to carbon, carbon’s versatility and ability to form stable, complex molecules make it the foundation of life as we know it. Silicon-based life remains hypothetical, as silicon compounds are generally less flexible and less stable in water. Still, the idea invites us to imagine life forms radically different from our own.