Episode 5 of 5 of our miniseries from author Henry Gee, based on his new book <em>A (Very) Short History of Life on Earth</em>.<hr><p style='color:grey; font-size:0.75em;'> Hosted on Acast. See <a style='color:grey;' target='_blank' rel='noopener noreferrer' href='https://acast.com/privacy'>acast.com/privacy</a> for more information.</p>