Known half-lives of radioactive isotopes are ‘known.’ Atomic fission and atomic fusion are reality, and knowing the half-lives of the radioactive isotopes involved helped make these discoveries and technologies possible. Medical linear accelerators and nuclear medicine are reality, and knowing the half-lives of the radioactive isotopes involved helped make these discoveries and technologies possible.
Carbon-14, potassium-argon, and uranium-lead are all accurate methods of dating objects specific to their particular time frames.
Some folks’ grasp on their religious beliefs is so tenuous and so shaky that they’re afraid the least little puff of knowledge will blow it away. If your belief in God depends upon the universe not being billions of years old, then you’re in deeper trouble than you can imagine, oh Ye of little faith.
