January 27th, 2017
Episode 386 of 457 episodes
It's generally thought that the evolution of complex life was a rare, once-in-4.5-billion-years event. But new research suggests that conditions were right for complex cells to evolve and die off at least once - or perhaps several times - before our lineage even got started. The reason? New evidence that there was enough oxygen in Earth's atmosphere between 2.4 and 2 billion years ago before it dropped off again suddenly. This suggests that the ingredients for complex life were present before the first fossil evidence of complex life. Jeff and Anthony discuss the uses for oxygen, and propose some reasons why it may have fluctuated.
Welcome to the Brain Training Podcast, the daily audio workout for your head. In this podcast we have two games for you, each with three rounds which get progressively harder. To enjoy the full experience, relax, and avoid distractions whilst you listen.