These were "DNA" (which he considered to be "very obvious"), "changes in bacteria and viruses," "the fossil record," "the presence of vestigial features in living organisms," "evidence from developmental biology," and his understanding of "radiometric evidence that the Earth is several billion years old".
In Sri Lanka, there is radiometric evidence from Anuradhapura that the non-Brahmi symbol-bearing black and red ware occur in the 10th century BCE.
However, Indian history and archaeology have pushed the date back to 15th century BC, and in Sri Lanka, there is radiometric evidence from Anuradhapura that the non-Brahmi symbol-bearing black and red ware occur at least around 9th or 10th century BC.
First results from sedimentological and geochemical analysis supported by archeological and radiometric dating provide evidence of fluvial and fluvio-eolian sedimentation during Marine Isotope Stage (MIS) 3 and 2 from at least 38 ka to 18 ka, followed by at least one erosional event that finally determined the recent valley morphology.
The age of these magnetic anomalies can be established by using fossil evidence and radiometric age determinations.
Evidence from radiometric dating, starting with the work of the British physicist Ernest Rutherford in 1905, showed that Earth is several billion years old.
According to evidence from radiometric dating and other sources, Earth was formed around four and a half billion years ago.
Together with new radiometric dates and the existing archaeological evidence, the results, presented here on 6 August at the annual meeting of the Ecological Society of America, suggest the following timeline: A moist climate from 9000 to 6000 years ago supported early farmers.
For paleontologists, the best evidence for anagenesis requires dense stratigraphic sampling and precise radiometric dating, temporally successive specimens of close phylogenetic relationship, clear stratigraphic data for specimens, and a high sample size that includes growth series1,18,19,20,24,25.
Lines of evidence include cladograms from independent datasets (i.e., fossils, morphology, and molecules), stratigraphy and radiometric dating to establish events in time, and paleoecology to interpret ancient environments.
Geological evidence and biocorrelative data from madtsoiid snakes [16], 'graculavid' birds [17] and an 'archaeonycteroid' bat [18] support the radiometric date (Text S1).
