10000000000	YA	Milky Way galaxy forms	large	geo	+	milky way galaxy forms timeline
5000000000	YA	Formation of the Sun	large	geo	+	formation sun timeline
4600000000	YA	Formation of Earth	great	geo	+	formation earth timeline
3800000000	YA	Earth's crust solidifies	small	geo	+	earth's crust solidifies timeline
3500000000	YA	First Prokaryotic cell organisms	large	life	+	first prokaryotic cell organisms timeline
3200000000	YA	Moon assumes present shape	small	geo	+	moon assumes present shape
3000000000	YA	Blue-green algae - photosynthesis	large	plant	+	blue-green algae photosynthesis timeline
2400000000	YA	Rise in the concentration of oxygen	large	geo	+	rise concentration oxygen timeline
2000000000	YA	The Oklo natural fission reactor	small	geo	+	oklo natural fission reactor timeline
1500000000	YA	Eukaryotic cell organisms develop	large	life	+	eukaryotic cell organisms develop timeline
590000000	YA	--> Cambrian period	small	time	+	cambrian period timeline
570000000	YA	Fossils of Ediacaran organisms are made	small	life	+	fossils ediacaran organisms timeline
545000000	YA	Cambrian explosion	great	life	+	cambrian explosion timeline
505000000	YA	<-- Cambrian period	small	time	+	cambrian period timeline
490000000	YA	Rise of the fish--first vertebrates	large	life	+	rise fish first vertebrates timeline
430000000	YA	Waxy coated algae begin to live on land	small	plant	+	waxy coated algae begin live land timeline
415000000	YA	Millipedes have evolved--first land animals	small	life	+	millipedes evolved first land animals timeline
400000000	YA	Seedless vascular plants evolved	large	plant	+	seedless vascular plants evolved timeline
380000000	YA	-----------	small	life	-	-----------
375000000	YA	Appearance of primitive sharks	small	life	+	appearance primitive sharks timeline
360000000	YA	Seed bearing gymnosperm plants evolved	large	plant	+	seed bearing gymnosperm plants evolved timeline
340000000	YA	Primitive insects have evolved	small	life	+	primitive insects evolved timeline
300000000	YA	Rise of the reptiles	large	life	+	rise reptiles timeline
280000000	YA	Supercontinent Pangaea	great	geo	+	supercontinent pangaea timeline
250000000	YA	Permian period mass extinction	great	life	+	permian period mass extinction timeline
230000000	YA	Roaches and termites have evolved	small	life	+	roaches termites evolved timeline
225000000	YA	Break-up of Pangaea begins	small	geo	+	break-up pangaea timeline
213000000	YA	--> Jurassic period	small	time	+	jurassic period timeline
200000000	YA	Primitive crocodiles have evolved	small	life	+	primitive crocodiles evolved timeline
160000000	YA	-----------	small	life	-	-----------
144000000	YA	<-- Jurassic period	small	time	+	jurassic period timeline
136000000	YA	Primitive kangaroos have evolved	small	life	+	primitive kangaroos evolved timeline
130000000	YA	Angiosperms -- flowering plants	large	plant	+	angiosperms flowering plants timeline
90000000	YA	Modern sharks have evolved	large	life	+	modern sharks evolved timeline
65000000	YA	K-T Boundary--extinction of the dinosaurs	large	life	+	K-T boundary extinction dinosaurs timeline
60000000	YA	Rats, mice, and squirrels have evolved	small	life	+	rats mice squirrels evolved timeline
50000000	YA	Primitive monkeys have evolved	large	life	+	primitive monkeys evolved timeline
28000000	YA	Koalas have evolved	small	life	+	koalas evolved timeline
25000000	YA	Brassica-Arabidopsis split	small	plant	+	brassica arabidopsis split
20000000	YA	The chimpanzee and hominid lines evolve	large	life	+	chimpanzee hominid lines evolve timeline
15000000	YA	Rat-Mouse split	small	life	+	rat mouse split
12000000	YA	Sorghum-Maize split	small	plant	+	sorghum maize split
10000000	YA	Gorilla-Human-Chimp split from Orangutans	small	life	+	gorilla-human-chimp split orangutans
5000000	YA	Human-Chimp split	small	life	+	human chimp split
4000000	YA	Development of hominid bipedalism	small	life	+	development hominid bipedalism timeline
2000000	YA	Widespread use of stone tools	small	life	+	widespread stone tools timeline
1010000	YA	First firemaking by humans	large	life	+	first firemaking humans timeline
160000	YA	First modern human (Homo sapiens)	large	life	+	first modern human Homo sapiens timeline
50000	YA	Sophisticated hunting activity with tools	small	life	+	sophisticated hunting activity tools timeline
32000	YA	First record of cave paintings	large	life	+	first cave paintings timeline
15000	YA	Adoption of agriculture	large	life	+	adoption agriculture timeline
10300	YA	End of the latest Ice Age	large	geo	+	end latest ice age
10000	BC	Population: 4,000,000	small	hist	+	world population history
5000	BC	Population: 5,000,000	small	hist	+	world population history
4000	BC	Population: 7,000,000	small	hist	+	world population history
3000	BC	Population: 14,000,000	small	hist	+	world population history
2500	BC	Abacus	large	tech	+	abacus history
2000	BC	Population: 27,000,000	small	hist	+	world population history
1000	BC	Population: 50,000,000	small	hist	+	world population history
500	BC	Population: 100,000,000	small	hist	+	world population history
1	AD	Population: 170,000,000	small	hist	+	world population history
200	AD	Population: 190,000,000	small	hist	+	world population history
500	AD	Population: 190,000,000	small	hist	+	world population history
1000	AD	Population: 265,000,000	small	hist	+	world population history
1200	AD	Population: 360,000,000	small	hist	+	world population history
1400	AD	Population: 350,000,000	small	hist	+	world population history
1622	AD	Slide ruler	great	tech	+	slide ruler history
1679	AD	Leibniz - binary mathematics	small	info	+	leibniz binary mathematics history
1838	AD	Morse Code	small	info	+	morse code history
1850	AD	Boolean Logic	small	info	+	boolean logic history
1859	AD	Darwin - Origin of Species	large	info	+	darwin origin species history
1865	AD	Mendel - Heredity/Genetics	small	info	+	mendel heredity genetics history
1876	AD	Bell - Telephone	small	tech	+	bell telephone history
1886	AD	Tesla - AC motor	great	tech	+	tesla AC motor history
1901	AD	Marconi - Radio	small	tech	+	marconi radio history
1928	AD	IBM 80 column punched card	small	tech	+	IBM 80 column punched card history
1950	AD	Population: 2,500,000,000	small	hist	+	world population history
1954	AD	Transistor	great	tech	+	transistor history
1961	AD	Vostok-1 - Gagarin	great	tech	+	vostok-1 gagarin
1968	AD	Internet: 4 hosts	large	web	+	internet history timeline
1969.5	AD	Apollo-11 - Armstrong&Aldrin	great	tech	+	apollo-11 armstrong aldrin
1972	AD	Internet: 23 hosts	small	web	+	internet history timeline
1974	AD	Intel-8080 [6,000 transistors]	small	tech	+	intel number transistors
1976	AD	Internet: 111 hosts	small	web	+	internet history timeline
1979	AD	Intel-8088 [29,000 transistors]	small	tech	+	intel number transistors
1981	AD	Internet: 213 hosts	small	web	+	internet history timeline
1982	AD	Intel-286 [134,000 transistors]	small	tech	+	intel number transistors
1982.5	AD	GenBank [680,338 base pairs]	small	info	+	genbank base pairs number growth
1983	AD	Internet: 562 hosts	small	web	+	internet history timeline
1983.5	AD	GenBank [2,274,029 base pairs]	small	info	-	genbank base pairs number growth
1984	AD	Internet: 1,024 hosts	small	web	+	internet history timeline
1984.5	AD	GenBank [3,368,765 base pairs]	small	info	-	genbank base pairs number growth
1985	AD	Intel-386 [275,000 transistors]	small	tech	+	intel number transistors
1985.5	AD	GenBank [5,204,420 base pairs]	small	info	+	genbank base pairs number growth
1986	AD	Internet: 2,308 hosts	small	web	+	internet history timeline
1986.5	AD	GenBank [9,615,371 base pairs]	small	info	-	genbank base pairs number growth
1987	AD	Population: 5,000,000,000	small	hist	+	world population history
1987.5	AD	GenBank [15,514,776 base pairs]	small	info	-	genbank base pairs number growth
1988	AD	Internet: 56,000 hosts	small	web	+	internet history timeline
1988.5	AD	GenBank [23,800,000 base pairs]	small	info	-	genbank base pairs number growth
1989	AD	Intel-486 [1,200,000 transistors]	small	tech	+	intel number transistors
1989.5	AD	GenBank [34,762,585 base pairs]	small	info	-	genbank base pairs number growth
1990	AD	Internet: 313,000 hosts	small	web	+	internet history timeline
1990.5	AD	GenBank [49,179,285 base pairs]	small	info	+	genbank base pairs number growth
1991.5	AD	GenBank [71,947,426 base pairs]	small	info	-	genbank base pairs number growth
1992.5	AD	GenBank [101,008,486 base pairs]	small	info	-	genbank base pairs number growth
1993	AD	Pentium [3,100,000 transistors]	small	tech	+	intel number transistors
1993.5	AD	GenBank [157,152,442 base pairs]	small	info	-	genbank base pairs number growth
1994.5	AD	GenBank [217,102,462 base pairs]	small	info	-	genbank base pairs number growth
1995	AD	Pentium Pro [5,500,000 transistors]	small	tech	+	intel number transistors
1995.5	AD	GenBank [384,939,485 base pairs]	small	info	-	genbank base pairs number growth
1996	AD	Yeast & E.coli Genome	large	info	+	yeast e.coli genome sequencing
1996.5	AD	GenBank [651,972,984 base pairs]	small	info	+	genbank base pairs number growth
1997	AD	Pentium II [7,500,000 transistors]	small	tech	+	intel number transistors
1997.5	AD	GenBank [1,160,300,687 base pairs]	small	info	-	genbank base pairs number growth
1998.5	AD	GenBank [2,008,761,784 base pairs]	small	info	-	genbank base pairs number growth
1999	AD	Drosophila melanogaster Genome	small	info	+	drosophila melanogaster genome sequencing
1999.5	AD	GenBank [3,841,163,011 base pairs]	small	info	-	genbank base pairs number growth
2000	AD	Arabidopsis Genome	large	info	+	arabidopsis genome sequencing
2000.5	AD	GenBank [11,101,066,288 base pairs]	small	info	+	genbank base pairs number growth
2001	AD	Internet: 120,000,000 hosts	small	web	+	internet history number hosts
2001.5	AD	GenBank [15,849,921,438 base pairs]	small	info	-	genbank base pairs number growth
2002	AD	Human Genome	large	info	+	human genome sequencing
2002.5	AD	GenBank [28,507,990,166 base pairs]	small	info	-	genbank base pairs number growth
2003	AD	Internet: 175,000,000 hosts	small	web	+	internet history number hosts
2003.5	AD	GenBank [36,553,368,485 base pairs]	small	info	-	genbank base pairs number growth
2003.9	AD	Internet: 200,000,000 hosts	small	web	+	internet history number hosts
2004.1	AD	Pentium 4 [125,000,000 transistors]	small	tech	+	intel number transistors
2004.5	AD	GenBank [41,808,045,653 base pairs]	small	info	+	genbank base pairs number growth
2005.2	AD	You are here!	great	hist	+	you are here