How has the way that we make news on Newsround changed in the 40 years we've been on air?
When Newsround launched in 1972, it was only as a six-week trial.
John Craven was the first presenter and he went on to front the show for 17 years.
Back then, there was only one bulletin a day, but now there are more updates than ever - as many as eight on a weekday!
40 years ago there were no computers to help journalists find or write stories like we do today.
Footage was shot onto film reels, as opposed to on digital memory cards - and if you wanted to edit or cut something, you had to physically snip the bit of film reel yourself!
Watch Joe's special 40th birthday report for more.