-
1 CE
when was earth formed
Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. Volcanic outgassing probably created the primordial atmosphere and then the ocean, but the early atmosphere contained almost no oxygen. -
2
when were the sea formed.
The water in the sea was thought to come from the Earth's volcanoes, starting 4 billion years ago, released by degassing from molten rock. -
3
how long was pangea formed?
In the case of Pangea, nearly all of the Earth's continents were connected into one large landmass. It is believed that Pangea began forming about 300 million years ago, was fully together by 270 million years ago and began to separate around 200 million years ago -
4
when did dinosaurs first appeared.
Dinosaurs first appeared between 247 and 240 million years ago. They ruled the Earth for about 175 million years until an extinction event 65.5 million years ago wiped out all of them, expect for the avian dinosaurs. -
5
when did the humans first appeare
The first human ancestors appeared between five million and seven million years ago, probably when some apelike creatures in Africa began to walk habitually on two legs. They were flaking crude stone tools by 2.5 million years ago. Then some of them spread from Africa into Asia and Europe after two million years ago -
6
when was the usa was discovered.
The arrival of Christopher Columbus in 1492 started the European colonization of the Americas. Most colonies formed after 1600. By the 1770s, thirteen British colonies contained 2.5 million people along the Atlantic coast east of the Appalachian Mountains. -
7
when was oil first discovered.
On August 28, 1859, George Bissell and Edwin L. Drake made the first successful use of a drilling rig on a well drilled especially to produce oil, at a site on Oil Creek near Titusville, Pennsylvania. -
8
when did world war 1 start.
world war one started on July 28, 1914 and ended on November 11, 1918. -
9
when did world war 2 start
world war 2 started at September 1, 1939 and ended at September 2, 1945 -
10
when was wifi was invented
to end of my time line i chose wifi was invented in 1991 i chose it becuse i think it has canged the way people live seance then what do you think should be in the nuber the spot.`
