The Earth was created after the Sun due to accretion of leftover particles and debris.
Early atmosphere formed consisting of mainly hydrogen.
RNA world. Organic compounds and proteins began to form after RNA could catalyze amino acid polymerization.
Protobionts evolve from primitive life.
Atmospheric water condenses into oceans.
Organisms start using photosynthesis to gather energy from the sun.
Single-celled organisms called prokaryotes evolve from primitive lifeforms such as the protobiont.
Due to outgassing from volcanoes, Earth's second atmosphere consisted mainly of nitrogen and carbon dioxide.
Water is first used as a source of hydrogen.
Endosymbiosis is a mutually beneficial relationship when one organism enters another and lives there.
The Great Oxygenation Event was the biologically caused appearance of oxygen in Earth's atmosphere.
Oxygen becomes a part of Earth's atmosphere.
The first multicellular organisms were a colony of cyanobacteria.
The first eukaryote came from a prokaryote that had taken in other prokaryotes.
Mitochondria are though to have evolved after entering a larger prokaryote. Plastids possibly evolved from cyanobacteria and enable eukaryotes to carry out photosynthesis.
The earliest known plants were a type of algae.
The earliest known animals were sea sponges.
The first vertebrate is believed to be the Myllokunmingia. Other early vertebrates include the Haikouichthys.
First land plants evolve from plants that moved onto land.