Role in The History of Life
History of life -4500 — – -4000 — – -3500 — – -3000 — – -2500 — – -2000 — – -1500 — – -1000 — – -500 — – 0 — Ph
a
n P
r
o
t
e
r
o
z
o
i
c A
r
c
h
e
a
n H
a
d
e
a
n ← Meteor Bombardment ends; first geochemical signs of life ← Earliest stromatolites ← ? Beginning of photosynthesis ← ? Beginning of atmospheric oxygen ← ? First eukaryotes ← ? First multicellular organisms ← Ediacaran organisms ← Cambrian substrate revolution Phanerozoic eon
Proterozoic eon
Archean eon
Hadean eon
A very brief history of life on Earth.
Axis scale is in millions of years ago. Further information: Timeline of evolution
Read more about this topic: Microbial Mat
Famous quotes containing the words role in, role, history and/or life:
“So successful has been the camera’s role in beautifying the world that photographs, rather than the world, have become the standard of the beautiful.”
—Susan Sontag (b. 1933)
“Is not our role to stand for the one thing which means our own salvation here but with which it will also be possible to save the world, and with which Europe will be able to save itself, namely the preservation of the white man and his state?”
—Hendrik Verwoerd (1901–1966)
“The greatest horrors in the history of mankind are not due to the ambition of the Napoleons or the vengeance of the Agamemnons, but to the doctrinaire philosophers. The theories of the sentimentalist Rousseau inspired the integrity of the passionless Robespierre. The cold-blooded calculations of Karl Marx led to the judicial and business-like operations of the Cheka.”
—Aleister Crowley (1875–1947)
“Who shall describe the inexpressable tenderness and immortal life of the grim forest, where Nature, though it be midwinter, is ever in her spring, where the moss-grown and decaying trees are not old, but seem to enjoy a perpetual youth.”
—Henry David Thoreau (1817–1862)