A popular way to determine the ages of biological substances no more than 50,000 years old is to measure the decay of carbon-14 into nitrogen-14.This process begins as soon as a living thing dies and is unable to produce more carbon-14.These different versions of elements are called isotopes, and small quantities of radioactive isotopes often occur in nature.For instance, a small amount of carbon exists in the atmosphere as radioactive carbon-14, and the amount of carbon-14 found in fossils allows paleontologists to determine their age. Marina Chicurel - Can Organisms Speed Their Own Evolution? : A Christian Biologist's In-Depth Look at the Evidence Reveals a Surprising Harmony Between Science and God (3.6MB)Bob Altemeyer - The Authoritarians (1.32 MB)National Academy of Science - Science, Evolution, and Creationism (3.16 MB)John Woodmorappe - Radiometric Geochronology Reappraised (3.35MB)Defining Reasonableness Online: A Case Study of an Internet Forumabout the Creation / Evolution Controversy John A Davison - A Prescribed Evolutionary Hypothesis Charlie Rose Show - Discussion About Charles Darwin (w/ EO Wilson & James Watson)New Scientist - Are We Still Evolving?Scientists know how quickly radioactive isotopes decay into other elements over thousands, millions and even billions of years.
Many of these theories sought to describe light as a ray -- a straight line moving from one point to another.You can travel on it or jump in it to cool off on hot summer days.Many of the products that you use every day contain it or were manufactured using it.The atomic number is the number of protons in an atom, and isotopes have the same atomic number but differ in the number of neutrons. For instance, you might have read about it in discussions of nuclear energy, the Fukushima reactor tragedy, or the development of nuclear weapons.It also shows up in popular culture: many superheroes’ origin stories involve radiation exposure, for instance—or, in the case of Spider-Man, a bite from a radioactive spider.Wall Street Journal - Intelligent Design Intrigues, but Is It Science?