Hal Clement

Born Harry Clement Stubbs in Massachusetts, he wrote as Hal Clement and became one of the defining voices of hard science fiction. He studied astronomy at Harvard, later earned advanced degrees in education and chemistry, and brought that scientific training straight into his fiction.

Much of his work is admired for taking science seriously without losing a sense of adventure. Mission of Gravity remains his best-known novel, famous for its carefully imagined high-gravity world, and his stories often asked readers to think like explorers, engineers, and scientists.

Alongside his writing career, he taught high school science for many years and was a familiar presence at science fiction conventions. Over time he was widely honored for his influence on the genre, including recognition in the Science Fiction and Fantasy Hall of Fame and as a Grand Master of science fiction.