Linus said:
You can't prove that life has existed for billions of years. And even after four billion years of microevolution I would expect to get a few species that just looked a little different than when they started.
A monkey cannot and never could evolve into a person. Do you want to know why? Because that monkey's parents were still monkeys. And that monkey must mate with another monkey to make more monkeys. If there were a gene that caused monkeys to lose all their hair, they would still be a monkeys no matter how far and how wide that gene spread. They would still think and act like monkeys. The only thing that might change would be the smell.
I can so prove that life has existed for billions of years. Its called a rock. Rocks can contain 2 kinds of evidence for life: fossil evidence and evidence of organic material. The 1st cannot be mistaken; if those fossils are dated as 3.2 billion years old, then life has existed for at least 3.2 billion years. The 2nd can indicate one of two things: that life already existed, or that the organic components needed to form life (nucleic acids for example) already existed. Either way, scientists know for
sure that there was definitely life 3.2 billion years ago.
So, we know from fossilized evidence of single cellular organisms that life existed on earth at least 3.2 billion years ago. Admit it or be laughed at.
Furthermore, despite your irrational beliefs, there is transitory evidence to support evolution. Since I am sure you dont care about the transitory evidence for the evolution of
hyracotherium vasacciense into the modern horse, Ill cut to the chase: there is transitory fossil evidence for the evolution of
ardipithicus ramidus to
homo erectus to
homo sapiens sapiens.
Ardipithicus ramidus: 5 to 4 million years ago. (The remains are incomplete but enough is available to suggest it was bipedal and about 4 feet tall.)
Australopithecus anamensis: 4.2 to 3.9 million years ago. (Its body showed advanced bipedal features, but the skull closely resembled the ancient apes.)
Australopithecus afarensis: 4 to 2.7 million years ago. (It was between 3'6" and 5' tall, fully bipedal, and its build (ratio of weight to height) was about the same as the modern human but its head and face were proportionately much larger. Brain capacity of 450 cc.)
Kenyanthropus platyops: 3.5 million years ago. (Discovered by Justus Erus in 1999 at Lomekwi in Kenya. This is a mostly complete, but heavily distorted, cranium with a large, flat face and small teeth. The brain size is similar to that of australopithecines.)
Australopithecus africanus: 3 to 2 million years ago. (Bipedal, slightly larger in body size. Brain capacity ranging up to 500 cc but not advanced enough for speech. The shape of the jaw was now like the human.
Australopithecus garhi: 2.5 million years ago. ( Discovered by Yohannes Haile-Selassie in 1997 at Bouri in Ethiopia. This is a partial skull including an upper jaw with teeth.)
Australopithecus aethiopicus: 2.6 to 2.3 million years ago. (Brain sizes were still about 500cc, with no indication of speech functions.)
Australopithecus robustus: 2.2 to 1.6 million years ago. (Brain size was up to 525cc but still no indication of speech capability.)
Australopithecus boisei: 2.1 to 1.1 million years ago. (The brain size was about the same as robustus.)
Homo habilis: 2.4 to 1.5 million years ago. (The brain size within this one species ranges from 500cc in earlier specimens to 800cc toward the end of the species life. Theres your microevolution! Brain shape shows evidence that some speech had developed. 5' tall and weighed about 100 pounds.)
Homo georgicus: 1.8 million years ago. (Discovered in 2001 at Dmanisi in Georgia. It consisted of a mostly complete skull, including a lower jaw belonging to the same individual. At around 600 cc, this is the smallest and most primitive hominid skull ever discovered outside of Africa. This skull and two others discovered nearby form a near-perfect transition between H.
habilis and
ergaster.
Homo erectus: 1.8 million to 300,000 years ago. (The brain size ranges from about 900cc in early species 1200ccalmost the equivalent of modern man!in later specimens. The species definitely had speech, plus tools, weapons, fire, and the ability to cook.)
Homo ergaster: 1.7 million years ago. (Discovered in 1975 at Koobi Fora in Kenya. This superb find consisted of an almost complete cranium. The brain size is about 850 cc, and the whole skull is similar to the Peking Man fossils.)
Homo antecessor: 780,000 years ago. (Discovered at Atapuerca in Spain. This is a partial face of a child who was probably about 10 to 11.5 years old.)
Homo neanderthalensis: 60,000 years ago. (Discovered in 1886 at the Grotto of Spy d'Orneau in Belgium. This find consisted of two almost complete skeletons. The excellent descriptions of the skeletons established that they were very old, and largely discredited the idea that the Neandertal physique was a pathological condition, but also erroneously concluded that Neandertal Man walked with bent knees.)
Homo sapiens (archaic): 200,000 to 500,000 years ago. (Provides the bridge between
Homo erectus and
Homo sapiens sapiens. Many skulls have been found with features intermediate between the two. Brain averaged about 1200cc and speech was indicated.)
Homo sapiens neandertalensis: 150,000 and 35,000 years ago. (Lived in Europe and the Mideast. Neandertals coexisted with H.sapiens (archaic) and early H.sapiens sapiens. It is not known whether he was of the same species and disappeared into the H.sapiens sapiens gene pool or he may have been crowded out of existence (killed off) by the H.sapien sapien. Recent DNA studies have indicated that the neandertal was an entirely different species and did not merge into the Homo sapiens sapiens gene pool.)
Homo sapiens sapiens: 120,000 years ago. (Modern humans have an average brain size of about 1350 cc.)
There you have ittransitory evidence for the
macroevolution of humans from
Ardipithicus ramidus, which was essentially a large monkey.