There is overwhelming evidence from multiple scientific disciplines that supports the theory of evolution. This evidence includes the fossil record that shows how life has changed over millions of years, similarities in the anatomy and biochemistry of living things, and geological evidence that the Earth is over 4 billion years old and has undergone gradual changes. The theory of evolution by natural selection, as proposed by Charles Darwin, explains how life can diversify over long periods of time through genetic variation and natural selection.

1. Evidence of Change Evolution

7. Evolution Evidence to Support Evolution

11. Miller-Urey Apparatus Evidence to Support Evolution

21. Radiometric Dating Evidence to Support Evolution Radioactive Parent Stable Daughter Half life Potassium 40 Argon 40 1.25 billion yrs Rubidium 87 Strontium 87 48.8 billion yrs Thorium 232 Lead 208 14 billion years Uranium 235 Lead 207 704 million years Uranium 238 Lead 206 4.47 billion years Carbon 14 Nitrogen 14 5730 years

30. Natural Selection and Speciation

32. The Voyage of the Beagle: Ports of Call Noted that populations of organisms were slightly different from place to place Each group was modified to their specific environment

33. The Galapagos Archipelago

34. Land Iguana Marine Iguana The Galapagos Iguanas

35. The Galapagos Tortoises

36. The Galapagos Tortoises

37. The Galapagos Finches

38. The Galapagos Finches The Origin of Species Interactive Exploration

45. Human Evolution