Explore Earth's climate dynamics in this comprehensive lecture on the causes of seasons and orbital influences. Delve into the Phanerozoic climate change, examining evidence of greenhouse warmth 100 million years ago and the Cretaceous target signal. Analyze orbital parameters like obliquity, precession, and ellipticity, and their long-term changes. Investigate the effects of increased tilt on polar regions, Earth's wobble, and the precession of its axis. Study apsidal precession, extreme solstice positions, and insolation variations. Examine the complexities of overlapping cycles and tectonic-scale orbital changes. Learn about Kepler's Laws and orbital mechanics. Discover major monsoon systems and their response to orbital forcing. Gain insights into the conceptual model of monsoon response to summer insolation, and remember the crucial role of the Coriolis Effect in climate systems.