BBC Radio 3 - The Essay - Available now

Annie Freud - The Kidneys—A Body of Essays: Series 2

4/5 Poet and artist Annie Freud discusses the kidneys, the body's most hard-working organs.

3/5 Crime writer Philip Kerr explains how brain surgery has advanced over the years.

2/5 Author Chibundu Onuzo investigates the 'goldilocks' nature of the thyroid gland.

1/5 Author William Fiennes, a sufferer of Crohn's disease, discusss the bowel.

5/5 The attractions of daybreak... when five writers set off on foot - and report back.

4/5 The attractions of daybreak... when five writers set off on foot - and report back.

3/5 The attractions of daybreak... when five writers set off on foot - and report back.

2/5 The attractions of daybreak... when five writers set off on foot - and report back.

1/5 The attractions of daybreak... when five writers set off on foot - and report back.

5/5 Lucy Winkett argues efforts to give eternity a shape and momentum are temporary and futile