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All life on Earth uses a three-letter code to produce 20 standard amino acids.
Speciation is the process by which new species are formed.By comparing the ratio of uranium-238 to lead-206, we can estimate how old the rock is.The same thing can be done with Samarium-neodymium, Potassium-argon, Rubidium-strontium, and Uranium-thorium transitions. There is a semi-constant ratio of carbon-14 in the air and ocean as it is constantly being created by cosmic rays.Cynognathus, a Triassic land reptile, fossils are found in South America and Africa.The Triassic era was between 250,000,000 and 200,000,000 years ago.Jump To: Age of the Earth and Its Fossils Genetics Comparative Anatomy Transitional Fossils Convergent Evolution Adaptations Vestigial Traits Artificial Selection Evolution in Action Sexual Selection And The List Goes On…
These reasons will work from the general to the specific.
Stromatolites grow at a maximum rate of 5cm every 100 years and a stromatolite 1.5 meters in diameter was found in Virginia and a 500cm high stromatolite was found at the foot of Wutai Mountain in China.
How genes and mutations work give us insights and tools into how evolution works.
Layers are laid down on top of each other, with the bottom layers laid down first and the top layers laid down last; therefore, the layers on the bottom are the oldest and the ones on the top are the youngest.
Dinosaur footprints, slug footprints, Australopithecus footprints and other footprints on top of any layer in the strata means that layer was at the top of the stack long enough for something to walk on top of it before it got covered by subsequent layers and hardened into solid rock.
The continents drift at a rate of a few centimeters a year and the distance between the Americas and Africa is 455,000,00 centimeters.