Humans have a long and increasing lifespan. However, some species live much longer. One is even immortal.

Pictures: iStock/Gilithuka, iStock/Dirk Freder, Keystone/AP Photo, iStock/Chris van de Velde, Kate Stafford/CC BY-SA 2.0/Wikimedia Commons, iStock/Africanway, Julius Nielsen/University of Copenhagen, Manfred Heyde/CC BY-SA 3.0/Wikimedia Commons, Keystone/DPA/Wildlife/N.Wu, Alamy

Additional articles of interest

Quiz: Ten questions about the course of life

Read more

Ten innovations to increase self-determination in old age

Read more

Ten truths about ageing

Read more