What you need to know about lemons and their role in the history of our planet

When scientists in the 1950s discovered lemons as a viable source of food, they made them a symbol of prosperity.

Now, lemons are one of the oldest plants on Earth.

The story of their evolution from food crops to food, and their place in the global food chain, is part of our special episode on the history and development of the world’s most delicious plants.

Listen to BBC Radio 4’s Today programme.

Find out more.