Discovery of radioactive dating

Life is well over 3.5 billion years old, and until about 600 million years ago, the planet was dominated by microbes.

discovery of radioactive dating-77

This process is called radiometric or radioactive dating.

Darwin had argued that the Earth was immensely old — which gave his gradual process of evolution plenty of time to unfold.

The great physicist Lord Kelvin had countered that the planet was actually relatively young — perhaps 20 million years old.

Some of these methods have helped to pin down the evolution of our hominid ancestors; anatomically modern humans evolved about 100,000 years ago.

While that's nearly 20 times older than the Earth was once thought to be, it's a geological eye blink.

Leave a Reply

  1. Ero video chat piss 09-Aug-2020 20:13

    The fact is you need to be able to learn from a man or a woman's point of view so that you will know exactly what someone wants to hear you say when you're chatting with them.

  2. Free adult black chat 30-Mar-2020 18:12

    Thousands of single professionals attend our events each month.

  3. Live web cam chat jamaica man 05-May-2020 13:13

    You both might get thrown from the horse and then you'll get to spend time together in a hospital bed.