Cosmic rays enter the earth's atmosphere in large numbers every day.
For example, every person is hit by about half a million cosmic rays every hour.
Dating is not necessary to demonstrate that evolution is a fact.
Chronological sequence is all that is really required.
The first members of the human family tree might come from Europe, not Africa.
Animals and people eat plants and take in carbon-14 as well.- Human Evolution Timeline Hominid Clade Tree showing an example of uncertainty of arrangement. Unfortunately, it is scattered among many sources, some of the best of which -- science journals -- require costly subscriptions to read.It is regrettable also that most of the photographic evidence that is web-available is limited to skulls.Overview of Methods Superposition Stratigraphy Dendrochronology Radiocarbon C14 Radiometric Dating Methods Obsidian Hydration Dating Paleomagnetic/Archaeomagnetic Luminescence Dating Methods Amino Acid Racemization Fission-track Dating Ice Cores Varves Pollens Corals Cation Ratio Fluorine Dating Patination Oxidizable Carbon Ratio Electron Spin Resonance Cosmic-ray Exposure Dating This is an excellent overview of dating methodologies, and is a chapter in a textbook on Archaeology.
You may find it useful for the clear definitions, and for excellent links on a variety of topic.
Making this even more believable was the announcement, some two weeks later, by scientists.