Who were Australia's black convicts and the truth about absinthe

What truth is there to the mystical powers of absinthe both in the past and its current form? Is it more myth than magic? Evan Rail investigates. And Santilla Chingaipe tells the stories of the 15 convicts of African descent that came with the first fleet, and the hundreds that followed. How does their story fit in the story of the global slave trade?