A car slides sideways on black ice. A seed waits instead of growing. An elevator cable breaks. An astronaut needs a part that does not fit.Each reveals something about friction—and why getting rid of it is not always the answer.In FRICTION FIGHTERS: From Stars and Seeds to Rocketships and AI, S. L. Crandell follows resistance through the natural world, human invention, and ordinary life. Stars, living cells, supermarkets, veterinary hospitals, Apollo 13, and artificial intelligence become windows into the same question: What is the friction doing?Some obstacles waste our time. Others provide traction, warn of danger, preserve judgment, or keep a small failure from becoming a catastrophe. A change that makes life easier in one place may quietly move the burden somewhere else.Drawing on engineering experience, personal stories, and a human–AI collaboration, Crandell introduces Friction Analysis—a practical way to trace what is trying to happen, what is resisting it, who carries the burden, and what might happen if that resistance disappears.Written for curious readers, FRICTION FIGHTERS offers a way to examine the systems we build, the conveniences we depend on, and the difficulties we encounter every day.Before you remove the obstacle, follow the friction. Read more