<p>Nancy Segal - Professor of Psychology, Director of the Twin Studies Center at California State University and author of 9 books about twins @nlsegal.</p>

Nancy Segal - Professor of Psychology, Director of the Twin Studies Center at California State University and author of 9 books about twins @nlsegal.

Extra: Private speech in twins

Jonathan responds to your texts and tweets, is joined in studio for all the latest science stories for Newsround and speaks to one of our two guests featured on the show.

Listen and subscribe to Futureproof with Johnathan McCrea on Apple Podcasts and Spotify.

Download, listen and subscribe on the Newstalk App.   

You can also listen to Newstalk live on newstalk.com or on Alexa, by and asking: 'Alexa, play Newstalk'

Science

Jonathan responds to your texts and tweets, is joined in studio for all the latest science stories for Newsround and speaks to one of our two guests featured on the show. Listen and subscribe to Futureproof with Johnathan McCrea on Apple Podcasts and Spotify. Download, listen and subscribe on the Newstalk App. You can also listen to Newstalk live on newstalk.com or on Alexa, by and asking: 'Alexa, play Newstalk'

Jonathan responds to your texts and tweets, is joined in studio for all the latest science stories for Newsround and speaks to one of our two guests featured on the show.

Listen and subscribe to Futureproof with Johnathan McCrea&nbsp;on Apple Podcasts and Spotify.

Download, listen and subscribe on the Newstalk App.&nbsp;&nbsp; 

You can also listen to Newstalk live on newstalk.com or on Alexa, by and asking: 'Alexa, play Newstalk'

Share Extra: Private speech in twins

Sign up to save your podcasts

Extra: Private speech in twins

Extra: Private speech in twins

More shows like Futureproof with Jonathan McCrea

The Last Word with Matt Cooper

Documentary on Newstalk

Callan's Kicks

The Pat Kenny Show

Inside Politics with Hugh Linehan

Irish Times Inside Business

The Hard Shoulder

The Left Wing

Lunchtime Live

The Big Tech Show

Futureproof Gold

Around the World

Music with Tom Dunne

Breakfast Business with Joe Lynam

Movies and TV on The Hard Shoulder

Taking Stock

The Hard Shoulder Health Check

Science with Luke O'Neill

The David McWilliams Podcast

Wonders of the World on The Hard Shoulder

Brendan O'Connor

Today with Claire Byrne

Down to Earth with Cara Augustenborg

The Other Hand

In The News

The Anton Savage Show

Inside the Crime

Newstalk Breakfast

Down To Business

The Hard Shoulder’s Guide to the Galaxy

As I Remember It: Bertie Ahern & The Good Friday Agreement

Soundscape

Path to Power

10 Years of Pat Kenny

Newstalk Daily