Who proposed the laws of planetary motion?

Johannes Kepler

What hero killed the Lernean Hydra? Which African ruler famously completed a pilgrimage to Mecca in 1324, displaying immense wealth? Which villain famously uses illusions, robotics, and special effects to trick Spider-Man? Who is known for inventing the steam engine improvements pivotal to the Industrial Revolution? In Polish culture, what type of decorated palm is traditionally blessed during Palm Sunday ceremonies?