Big Bang Oldest known Gamma Ray Burst First galaxies Milky Way Galaxy formed Milky Way Galaxy disk formed Formation of the Solar System Antares explodes into a supernova Proper motion makes all constellations unrecognizable Saturn loses its rings Solar System completes one galactic year Milky Way-Andromeda collision Sun expands into a red giant Sun becomes a white dwarf Solar System ceases to exist Galaxies disappear beyond light horizon Star formation ends

First known remains of biotic life First Life (Prokaryotes) Photosynthesis Complex Cells (Eukaryotes) First Multicellular Life Simple Animals Arthropods Fish and Proto-amphibians Land Plants Insects and Seeds Amphibians Reptiles 57% of all biological families and 83% of all genera die Dinosaurs Mammals Birds Flowers Non-avian dinosaurs die out All complex life die All life on Earth dies

Primates Apes Hominids The humans and Chimpanzees Split Humans first walk upright Primitive Humans and Stone Tools Domestication of Fire Anatomically Modern Humans Sculpture and Painting Agriculture Copper Age Early Bronze Age Alphabet and Wheel Late Bronze Age to Early Iron Age Iron Age Beginning of Classical Antiquity Classical Greece, Ashokan Empire Euclidean Geometry, Archimedean Physics Ptolemaic astronomy, Invention of Numeral 0 Renaissance in Europe Modern History Pyramids of Giza erode away Mount Rushmore erodes away Solar eclipses no longer possible Earth's surface hot enough to melt lead

Human Migration Building of Stonehenge Cursus First Dynasty of Egypt Early Dynastic Period in Sumer Akkadian Empire Code of Hammurabi Middle Kingdom of Egypt Beginning of Classical Antiquity Buddha, Mahavira, Zoroaster, Confucius Qin Dynasty Classical Greece Roman Republic Roman Empire, Christ Gupta Empire Muhammad Rise of Byzantine Empire Maya civilization Song Dynasty Mongol Empire, Crusades Christopher Columbus Voyages to the Americas Classical Music to the Time of Johann Sebastian Bach Maratha Empire The last 437.5 years before present