Isotopes decay at different rates

Uranium-238 half life of around 4.5 billion years

Carbon-14 has a half life of 5,730 years

Radiometric dating of meteorites dates earth.

Evolution evidenced by fossils, rocks, radioactive isotopes, DNA  and comparative anatomy.

See “Why evolution is true” Coyne J A Oxford Uni Press
ISBN: 978-0-19-923085-3

Self-replicating molecules more than 3.5 BYA.

Photosynthetic bacteria 3.5 BYA.

Eukaryotes with a nucleus and chromosomes 1.5 BYA.  Sponges, invertebrates and then the earliest chordate, looking like a 30mm long eel, 500 to 600 MYA – grandparent to all vertebrates.

Lobe-finned fish (origin of quadruped) 400 MYA.

Tiktallik – between fish and amphibian, left the water 375 MYA and evolved to become a protoreptile or protomammal about 300 MYA.