2006-06-30 01:31:22 · 8 answers · asked by deadman_walking_1205 1 in Science & Mathematics ➔ Biology
It has recently been suggested that life on earth began much earlier than once thought. The earth is around 4.5 billion years old. But life is thought to have started just 500 million years into its existence - not long after it was first able to really support life.
2006-06-30 02:31:57 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Geological evidence suggests the following:
* 4,600 millon years ago is the origin of earth
* 3,800 million years old is the oldest rock found
* 3,500 million years old are the first fossils (prokaryotes)
* 600 million years old are the first soft-shell invertabrates
* 359 million years ago bony fish and insects appear
* 251 miillion years ago reptiles appear
* 145 million years ago was the Jurassic period of dinosaurs
* 23 million years ago primates evolved, including mokeys
* 1.8 million years ago the genus Homo appear (caveman)
* .01 Ice ages; humans appear
2006-06-30 02:00:57 · answer #2 · answered by Emerson 5 · 0⤊ 0⤋
Genesis 1:1 - In the beginning...
2006-06-30 01:43:33 · answer #3 · answered by Zach 2 · 0⤊ 0⤋
Life started during the precambrian time but the date is not that accurate
2006-06-30 01:34:28 · answer #4 · answered by Anonymous · 0⤊ 0⤋
about 4.5 millions years back when earth enivronment was more or less resemble broth an ideal condition for chemotrops to start life.
2006-06-30 01:39:51 · answer #5 · answered by made in indya 2 · 0⤊ 0⤋
That's the million dollar question. If anyone of us could answer that we would be rich. No one knows for sure.
2006-06-30 04:11:27 · answer #6 · answered by Pete S 2 · 0⤊ 0⤋
That is not a million dollar question u weirdo.
Emerson's explanation is pretty much it.
2006-06-30 07:08:44 · answer #7 · answered by kevin k 2 · 0⤊ 0⤋
When God put us here!
2006-06-30 01:34:21 · answer #8 · answered by musiclover 5 · 0⤊ 0⤋