Radioactive dating is accurate. the rate of decay of a radioisotope is determined by its mass and a physical constant. because we know this we can then extrapolate a graph to what in other circumstances would be laughable, because for astrophysics to work in any way, our constants stay constant.
I often wonder what creationists want from a transitional fossil. It seems they will accept nothing less than the back half of a dinosaur attached to the front half of a chicken. It is also ridiculous to propose that we have a lack of transitional fossils. even if there was a shortage the percentage of organisms is so small that it still would not be a problem.
In regards to macroevolution, why choose a species as a cut-off point. Our definition of a species is a complete and total mess. One example for those who care enough to look it up is the scottish crossbill.
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