# data[].attributes.body
Rock samples with low carbon-13

Biological processed carbon becomes depleted of carbon-13

Usually tends to be stable

# data[].attributes.body
Oldest visible evidence of life

Atmosphere devoid of oxygen

Stromatolites

# data[].attributes.body
Grypania spiralis

Single-celled eukaryote

Cell walls preserved

# data[].attributes.body
Evolved from cyanobacteria

Engulfed by an aerobic eukaryotic cell

# data[].attributes.body
Phosphorite deposit in China

Diverse fossils

Biodiversity before macroscopic animals

# data[].attributes.body
First diversification of larger organisms

Most became extinct by the end of the period

# data[].attributes.body
Global diversification of life

Rise of oxygen

Rise of animal lineages

# data[].attributes.body
Richest fossil beds

Cambrian explosion

Well-preserved soft tissue fossils

# data[].attributes.body
Ordovician period

Moss like organisms

Rise of modern plant diversity

# data[].attributes.body
Transitional fish

Fish with land vertebrate characterisitics

# data[].attributes.body
Devonian period

Amphibians colonized land

Stem group of land vertebrates

# data[].attributes.body
Dimetrodon

Gorgonopsids

Syanpsids

Repitles more closely related to mammals than dinosaurs

Mammals on alpha development, stem from reptiles

# data[].attributes.body
Earliest known specimen of placental mammal

# data[].attributes.body
Ethiopian fossils

Early members of human lineage

Skeletal adaptations for walking on two legs

# data[].attributes.body
Africa

Modern humans appeared till 0.2 MYA