Hankelins

Hankelins are a fictional species featured in the science fiction novel "Project Hail Mary" by Andy Weir. They are an extraterrestrial species encountered by the protagonist, Ryland Grace, during his mission to save Earth. Hankelins are described as silicon-based lifeforms, a significant departure from Earth's carbon-based biology. Their physiology is adapted to their home star system, Tau Ceti, which orbits a dim, cool star.

Physically, Hankelins are characterized by their crystalline exoskeletons, which are tough and provide protection. They possess multiple limbs and a unique sensory apparatus that allows them to perceive their environment in ways alien to humans. Communication among Hankelins is achieved through a complex system of light pulses and resonant frequencies emitted from their bodies. Their technology is advanced, with a focus on energy manipulation and materials science, reflecting their silicon-based nature.

The Hankelins are presented as a generally peaceful and scientifically curious species. They face a similar existential threat to humanity, their sun's light output decreasing, which motivates their own interstellar endeavors. Their interactions with Ryland Grace are initially cautious but evolve into a collaborative effort to solve the mutual crisis. The novel explores themes of interspecies cooperation and the universal drive for survival, with Hankelins serving as a crucial element in this narrative. Their existence challenges conventional biological assumptions and expands the possibilities of alien life in science fiction.