This is the Happy Pod from the BBC World Service.

I'm Alex Ritson and in this edition.

I am so grateful and so appreciative that people have allowed me into their lives and into their hearts.

Thank you so much for changing my life. They've saved my life.

The homeless man whose piano playing went viral, allowing him to raise money to help others. How love has inspired a husband in Iowa to turn his whole street into a winter wonderland.

A remarkable survival story.

The guy was screaming, cut, cut, please, cut.

We thought he has some medical problems and actually was screaming,

we have to take care about his cat.

His tiny ginger cat helped him stay alive in snowy mountains for eight days and...

The AI program that can tell where a dolphin is from by its accent.

We begin with a man whose hidden musical talent is helping him turn his life around and supporting others.

Earlier this year, Rees Wyn Jones was homeless and had gone to a church with friends for something to eat.

He sat down at a piano to play and as everyone

stopped to listen, a volunteer started filming. The video from Penzance in southwestern England went

viral on social media and his performance of Queen's Bohemian Rhapsody has even been praised by the group's

drummer Roger Taylor as dazzling.

Now, Rees has been performing concerts and raising thousands of dollars for charities

helping other homeless people.

Reese has been talking to my colleague Evan Davis.

The director came over to me because she saw that I was suffering, and she asked me,

is there anything that you needed?

...