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Actual Date
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1998 Calendar Date
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Description
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Present
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12/31/98 Midnight
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Homo Sapiens (modern)
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10,000 years ago
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12/31/98 11:58:51 p.m.
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The End of The Last Ice Age
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50, 000 years ago
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12/31/98 11:55:17 p.m.
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Neanderthal
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100,000 years ago
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12/31/98 11:49:34 p.m.
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Homo Sapiens (ancient)
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500,000 years ago
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12/31/98 11:03:52 p.m.
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Homo erectus
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1 million years ago
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12/31/98 10:06:44 p.m.
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Australopithecus bosei
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2 million years ago
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12/31/98 8:12:29 p.m.
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Australopithecus robustus
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2 million years ago
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12/31/98 8:12:29 p.m.
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Homo habilis
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3 million years ago
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12/31/98 6:18:13 p.m.
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Australopithecus africanus
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5 million years ago
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12/31/98 2:29:42 p.m.
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Australopithecus afarenis
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2.8 million years ago
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12/31/98 6:41:56 p.m.
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Isthmus of Panama Closed the Gap Between N. & S. America
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24 million years ago
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12/30/98 2:18:44 a.m.
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Earliest primates
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30 million years ago
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12/29/98 2:53:10 p.m.
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Himalayas Began Forming
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58 million years ago
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12/27/98 9:33:52 a.m.
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Earliest grasses and the division of mammals
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65 million years ago
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12/26/98 8:14:03 p.m.
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Massive Extinction of the Dinosaurs
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70 million years ago
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12/26/98 10:42:44 a.m.
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Rocky Mountains Formed
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135 million years ago
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12/21/98 6:55:47 a.m.
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Earliest Known Flowering Plant Fossils Deposited
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136 million years ago
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12/21/98 5:01:31 a.m.
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Mesozoic Era: Cretaceous Period
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144 million years ago
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12/20/98 1:47:26 p.m.
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Earliest flowering plants
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160 million years ago
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12/19/98 7:19:16 a.m.
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Earliest Known Bird Fossils Deposited
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180 million years ago
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12/17/98 5:14:03 p.m.
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Breakup of Pangaea Began
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190 million years ago
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12/16/98 10:11:26 p.m.
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Mesozoic Era: Jurassic Period
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200 million years ago
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12/16/98 3:08:50 a.m.
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Earliest Known Mammal Fossils Deposited
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208 million years ago
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12/15/98 11:54:44 a.m.
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Earliest birds and mammals
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210 million years ago
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12/15/98 8:06:13 a.m.
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Volcanic Activity in New England
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225 million years ago
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12/14/98 3:32:18 a.m.
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Last Trilobites Died Out
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225 million years ago
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12/14/98 3:32:18 a.m.
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Mesozoic Era: Triassic Period
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245 million years ago
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12/12/98 1:27:05 p.m.
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Age of the dinosaurs begins
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250 million years ago
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12/12/98 3:55:47 a.m.
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Appalachian Mountains Formed
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286 million years ago
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12/9/98 7:22:23 a.m.
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Age of the amphibians
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290 million years ago
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12/8/98 10:45:21 p.m.
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Earliest known reptile fossils deposited
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320 million years ago
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12/6/98 2:37:31 p.m.
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Earliest known reptiles
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325 million years ago
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12/6/98 5:06:13 a.m.
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Paleozoic Era: Pennsylvanian Period
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330 million years ago
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12/5/98 7:34:55 p.m.
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Much of continent land masses underwater
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345 million years ago
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12/4/98 3:00:00 p.m.
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Paleozoic Era: Mississippian Period
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360 million years ago
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12/3/98 10:27:05 a.m.
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Earliest known winged insects
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390 million years ago
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12/1/98 1:19:16 a.m.
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Earliest known fossils of land animals deposited
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395 million years ago
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11/30/98 3:47:57 p.m.
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Devonian Period
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408 million years ago
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11/29/98 3:02:34 p.m.
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Earliest known vascular plants and amphibians
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430 million years ago
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11/27/98 9:08:50 p.m.
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Paleozoic Era: Silurian Period
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438 million years ago
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11/27/98 5:54:44 a.m.
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Earliest known land plants and insects
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500 million years ago
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11/22/98 7:50:34 a.m.
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New Madrid Rift Zone opened
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500 million years ago
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11/22/98 7:50:34 a.m.
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Paleozoic Era: Ordovician Period
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505 million years ago
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11/21/98 10:19:16 p.m.
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Earliest known corals
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570 million years ago
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11/16/98 6:32:18 p.m.
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Paleozoic Era: Cambrian Period
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600 million years ago
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11/14/98 9:24:29 a.m.
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Earliest known trilobite fossils deposited; Also earliest fish
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1 billion years ago
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10/13/98 3:40:08 p.m.
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Formation of iron, copper, and nickel ores
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1.2 billion years ago
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9/18/98 5:09:04 p.m.
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Earliest known animal fossils deposited
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2.5 billion years ago
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6/16/98 3:08:50 p.m.
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Earliest colonial algae and soft bodied invertebrates
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3 billion years ago
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5/7/98 10:58:23 p.m.
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Algal Stromatolites formed in Rhodesian limestones
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3.2 billion years ago
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4/22/98 2:06:13 a.m.
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Oldest known rock formed in SW Greenland
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3.2 billion years ago
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4/22/98 2:06:13 a.m.
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Earliest microfossils formed in S. African chert
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3.5 billion years ago
(some resources claim 4 billion years ago)
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3/29/98 6:43:53 a.m.
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2nd Hypothesis: life appears - earliest known algae and bacteria
form
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4 billion years ago
(some resources claim 3.5 billion years ago)
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2/17/98 2:37:31 p.m.
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Life appears: earliest known algae and bacteria form
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4.6 billion years ago
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1/1/98 12:00:00 a.m.
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Earth formed
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