Crusty, cold-bath-and-calisthenics-loving James Oliver perfected the “Oliver Chilled Plow” in 1868. Although the first metal plow had been made in 1837, Oliver’s chilled cast-iron model was ...

It looks like something straight out of a sci-fi movie: a massive metal robot with three claw-like front limbs, tearing through the earth like a wild bulldozer. This isn’t science fiction, ...