how the scientist know about animals, apes, and plants etc that were 10 million years ago?
2007-01-11 16:54:47 · 11 answers · asked by My Last Name 1 in Arts & Humanities ➔ History
We use radiodating. We take a soil sample from around the fossil bone. Some of that soil will have slight amounts of radioactive elemnts. This radioactivity disappears over time at a characteristic rate or half life. For example, if a radioactive chemical has a half-life of 1 million years, after 1 million years, only 1/2 of the sample will still be radioactive. After 2 milion years, 1/4 will still be radioactive. After 3 million years, 1/8 will still be radioactive. We can dtermine the age of the soil (and fossil) by determining how much radioactivity is still present in the sample..
2007-01-11 17:08:25 · answer #1 · answered by ivorytowerboy 5 · 1⤊ 0⤋
Scientific studies and proofs to that study, geology, anthropology, and archeology. There are many forms of study that will prove age and technology is incredibly accurate today. Try going to the site www.history.com and look up the iceman? See pictures audio/visual as well. Or look up the cave men and the animal fossils found like the dinosaur beds of death in the La Brea tar pits in California?
2007-01-12 02:19:34 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Fossils.
2007-01-12 01:02:38 · answer #3 · answered by pianogal73 3 · 1⤊ 0⤋
The same way they will find out man was here several million years ago,They guess,then they get research money to try to convince others to go along,so they can write a book to keep their job at the university and make money.That allows them to teach others and fill their heads with mush and control the facts if they can keep the lid on long enough.then they will be welcome into the communist party and control the world,and travel free.
2007-01-17 20:19:35 · answer #4 · answered by Anonymous · 0⤊ 1⤋
Fossils. They have fossils of these animals and plants.
2007-01-12 06:25:04 · answer #5 · answered by Qyn 5 · 0⤊ 0⤋
From fossils
2007-01-12 01:50:33 · answer #6 · answered by brainstorm 7 · 1⤊ 0⤋
Fossils and evidence of their existence
2007-01-12 02:31:05 · answer #7 · answered by GG Alan Alda 4 · 0⤊ 0⤋
have you ever heard of fossils, or carbon date testing, or ask .com
2007-01-17 15:23:16 · answer #8 · answered by pnn177 4 · 0⤊ 0⤋
he used a time machine called the XLR-3000
2007-01-12 01:36:28 · answer #9 · answered by maxin and relaxin 2 · 0⤊ 1⤋
bones, fossils, cave paintings
2007-01-12 01:29:35 · answer #10 · answered by Anonymous · 1⤊ 0⤋