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570,000,000-
Cambrian Period begins on Earth.
(Known history)
569,998,020-
Cambrian explosion begins on Earth, as more
and more complex life-forms appear.
(Known history)
569,965,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
563,589,852-
Sponges and corals dominate Earth’s ocean
floors.
(Known history)
563,565,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
562,853,652-
Sea worms appear on Earth.
(Known history)
562,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
510,000,000-
Ordovician Period begins on Earth.
(Known history)
509,202,210-
Brachipods appear on Earth.
(Known history)
509,000,095-
Starfish appear on Earth.
(Known history)
506,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
499,998,020-
First trilobites appear on Earth.
(Known history)
499,995,500-
The supercontinent of Gondwana occupies the
south polar region of Earth, while a smaller Red Sandstone Continent occupies
the northern regions.
(Known history)
498,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
484,511,002-
Bryozoans appear on Earth.
(Known history)
458,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
453,332,718-
Attempting to elude the Time Lords, the Doctor
materializes the TARDIS at a point in deep space.
(Doctor Who)
450,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
440,022,210-
Climatic changes result in a mass extinction
of many species on Earth.
(Known history)
440,000,000-
Silurian Period begins on Earth. In 1974 CE,
a human scientist will mistakenly presume that the Reptile People revived
in Derbyshire are from this period.
(Known history and Doctor Who)
439,998,007-
Vascular plants and mosses begin growing in
Earth’s tidal mud flats.
(Known history)
439,011,793-
Reef corals appear on Earth.
(Known history)
438,046,461-
Sea lilies appear on Earth.
(Known history)
437,839,444-
Sea snails appear on Earth.
(Known history)
434,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
424,998,007-
Centipedes and millipedes appear on Earth.
(Known history)
410,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
410,000,000-
Devonian Period begins on Earth.
(Known history)
409,491,311-
Spore-bearing plants such as club mosses and
horsetails cover the surface of Earth.
(Known history)
408,855,401-
Primitive insects appear on Earth.
(Known history)
408,085,651-
Lungfish appear in Earth’s seas and begin
crawling onto the land.
(Known history)
408,074,874-
Jawless fish inhabit the freshwater bodies
of Earth.
(Known history)
402,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
399,998,495-
The Jagaroth destroy themselves in a massive
interstellar war. One last surviving spaceship lands on Earth to make repairs.
Scaroth, the ship’s pilot, sends the ship into warp too close to the planet’s
surface, causing an anti-matter explosion. Scaroth is split into twelve
temporal fragments which are scattered throughout the future history of
Earth. Radiation from the explosion energizes pools of amino acid on the
planet surface, revitalizing the evolution of life on Earth.
(Doctor Who)
Scaroth’s twelfth temporal fragment arrives
from the year 1979 CE in an attempt to stop himself from launching the
Jagaroth ship. The Doctor, Romana, and Duggan have also come from the future
to stop Scaroth from stopping himself. Scaroth is stopped by the human
Duggan with what is probably the most important punch in history. An unconscious
Scaroth returns to 1979. The TARDIS returns to the twentieth-century as
history runs its normal course.
(Doctor Who)
399,998,200-
Date of Creation according to some later Mayan
calculations.
(Mayan records)
399,998,062-
The first coelecanths appear in Earth’s oceans.
(Known history)
394,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
385,061,144-
The first amphibians appear on Earth.
(Known history)
360,000,000-
Carboniferous Period begins on Earth.
(Known history)
359,410,221-
Dragonflies and other flying insects appear
on Earth.
(Known history)
358,287,109-
Goniatites, an early species of encephalopod,
are present in Earth’s oceans.
(Known history)
354,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
336,076,888-
First spiders appear on Earth.
(Known history)
334,998,024-
Limestone deposits form on Earth.
(Known history)
325,410,245-
Gondwana collides with the Northern Continent
to form the super-continent of Pangaea.
(Known history)
325,000,000-
Number of creatures on Earth returns to Ordovician
levels.
(Known history)
322,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
313,977, 071-
Archimedes, a species of bryozoan with
a screw-shaped inner skeleton, appears on Earth.
(Known history)
312,743,643-
Freshwater clams and mussels appear on Earth.
(Known history)
306,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
302,221,812-
Attempting to elude the Time Lords, the Doctor
materializes the TARDIS first over and then under one of Earth’s oceans.
He gives up after the Time Lords cause water to leak into the TARDIS interior,
thus demonstrating they can reach him no matter where he flees. The TARDIS
is conveyed back to Gallifrey for the Doctor’s trial.
(Doctor Who)
299,997,734-
The inhabitants of the planet Organia evolve
beyond their corporeal forms and become beings of pure thought and energy.
(Star Trek)
299,410,353-
Early, amphibious reptiles appear on Earth.
(Known history)
298,765,005-
The Metahedron moves to another location in
the Universe.
(Doctor Who)
