Derek Cullen has cycled across Africa, hiked the Pacific Crest Trail and walked the Irish countryside, documenting his travels as he goes. He spoke to Maggie about what lead him to set off on his adventures and the impact it has had on his health and happiness.

Professor Declan Devane spoke to Maggie about the 'The People’s Trial' which aims to help create a greater understanding of the clinical trial process and how they can be used to answer important questions.

The stories and headlines of the day that grabbed Maggie's attention.

If you could write a letter that you have never sent, who would you send it to and what would you say? We want you to write it now and post it to the Ryan Tubridy Show, Donnybrook, Dublin 4. This morning Ryan read some more letters from listeners and spoke to Bernie about the letter she wrote to her daughter Caoimhe.

Mark spent most of his life working as an esteemed botanist and senior curator in the Natural History Museum in London but his career took a surprising turn which now sees him turning his talent to helping the police crack cases. Mark told Ryan about the work of a forensic botanist.

The stories and headlines of the day that grabbed Ryan's attention.

If you could write a letter that you have never sent, who would you send it to and what would you say? We want you to write it now and post it to the Ryan Tubridy Show, Donnybrook, Dublin 4. This morning Ryan read some more letters from listeners and spoke to Sheila about the letter she wrote to her mother-in-law.

Pádraig O’Reachtagáin has been named ‘Dentist of the Year’ in recognition of how he helped a patient escape an abusive relationship after treating her broken tooth. He joined Ryan in studio to share his story.

The stories and headlines of the day that grabbed Ryan's attention.

If you could write a letter that you have never sent, who would you send it to and what would you say? We want you to write it now and post it to the Ryan Tubridy Show, Donnybrook, Dublin 4. This morning Ryan read two of the letters we've received.