This week, we tackle one of the biggest questions that has puzzled scientists and philosophers for centuries – the concept of ‘forever’. First, we look to the future where advances in science could give the species we thought lost forever a second chance at life and wonder what the archaeologists of the future (human or otherwise) will learn about our civilisation from the items we leave behind. Will plastic be humanity's lasting legacy on this planet and what will happen to Earth’s great cities once we are no more? Finally, we attempt to find the edge of the universe and ask if it too has an ending. While occasionally overwhelming and uncertain, our future near and far is impossibly intriguing. Don’t forget to subscribe so you never miss an episode and let us know what you think on social media! Facebook: https://www.facebook.com/bbcearth/ Instagram: https://www.instagram.com/bbcearth/ Twitter: https://twitter.com/bbcearth