So, we rely on radiometric dating to calculate their ages.
Radiometric dating, or radioactive dating as it is sometimes called, is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.
This chain eventually ends with the formation of a stable, nonradioactive daughter nuclide.
Each step in such a chain is characterized by a distinct half-life.
Here we show that two independent techniques, the combined electron spin resonance/U-series method used with mammal teeth and infrared radiofluorescence applied to sand grains, date the type-site of at Mauer to 609 ± 40 ka.
This result demonstrates that the mandible is the oldest hominin fossil reported to date from central and northern Europe and raises questions concerning the phyletic relationship of ” fossils from Trinil in Java, the Mauer jaw is one of the classic finds of paleoanthropology.
The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay.
The different methods of radiometric dating are accurate over different timescales, and they are useful for different materials.1,985 dates older than the evolutionist age [13 billion years] of the Universe., was found in 1907 in fluvial sands deposited by the Neckar River 10 km southeast of Heidelberg, Germany.The Mauer sands are overlain by several Middle and Late Pleistocene glacial loess layers with interstratified interglacial paleosoil horizons, which constrain the age of the fossil to older than 350 ka (3).As a member, you'll also get unlimited access to over 55,000 lessons in math, English, science, history, and more.