For example, about 1.5 percent of a quantity of Uranium 238 will decay to lead every 100 million years.
By measuring the ratio of lead to uranium in a rock sample, its age can be determined.
As such, it can still very easily be disproved (e.g.
This rate of decay is constant for a given isotope, and the time it takes for one-half of a particular isotope to decay is its radioactive half-life.Before then, the Bible had provided the only estimate for the age of the world: about 6,000 years, with Genesis as the history book.Hutton's theories were short on evidence at first, but by 1830 most scientists concurred that Noah's ark was more allegory than reality as they documented geological layering.During my second year of college, I had my first existential crisis and a paranormal event changed my studies from science to business.I still held my energy dreams, however, and in 1986, eight years after that first paranormal event, I had a second one that suddenly caused me to move up the coast from Los Angeles to Seattle, where I landed in the middle of what is arguably the greatest attempt yet made to bring alternative energy to the American marketplace.Using this technique, called radiometric dating, scientists are able to "see" back in time.Original question: How does paleontology support the theory of evolution? I could do it myself, but I think it is better to leave the question as it is and point out the mistake it carries.But for humans whose life span rarely reaches more than 100 years, how can we be so sure of that ancient date? Even the Greeks and Romans realized that layers of sediment in rock signified old age.But it wasn't until the late 1700s -- when Scottish geologist James Hutton, who observed sediments building up on the landscape, set out to show that rocks were time clocks -- that serious scientific interest in geological age began.In 1974, as that engine created a stir in the USAs federal government, I began dreaming of changing the energy industry.In that same year, I had my cultural and mystical awakenings.