Explore the geometric and algebraic aspects of space curves in this comprehensive differential geometry lecture. Delve into the associated lines and planes at each point on a space curve, including tangent vectors, normal planes, and osculating planes. Examine curvature and torsion for finite segment curves, with applications in robotics. Discover G. Monge's contributions to the geometrical aspects of space curves, including the concept of axis and developable surfaces. Investigate algebraic aspects, including alternate formulas for curvature and torsion using velocity and acceleration. Study invariants under curve reparametrization and gain insights into both unit speed and general space curves. This lecture provides a thorough examination of space curves, blending geometric intuition with algebraic precision.