The cola and Mentos experiment, which later became an internet sensation, was first publicly demonstrated by Lee Marek and 'Marek's Kid Scientists' on the Late Show with David Letterman in 1999.

The cola and Mentos experiment first captivated audiences in 1999 on The Late Show with David Letterman, performed by Lee Marek and his ‘Kid Scientists.’ There was also a video of Letterman ...