PBS | 9:00 pm

Of all the continents on Earth, none preserves a more spectacular story of its origins than Australia. The four-part miniseries "Australia's First 4 Billion Years" takes viewers on an adventure from the birth of the Earth to the emergence of the world we know today. Host and geologist Richard Smith presents titanic dinosaurs and giant kangaroos, sea monsters and prehistoric crustaceans, disappearing mountains and deadly asteroids.