Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

"Kid Scientists" regular reflects on Letterman run_00014610
"Kid Scientists" regular reflects on Letterman run_00014610

    JUST WATCHED

    "Kid Scientists" regular reflects on Letterman run

MUST WATCH

"Kid Scientists" regular reflects on Letterman run

Retired Science teacher Lee Marek made a name for himself performing explosive experiments with David Letterman. He tells CNN about his time.

"Kid Scientists" regular reflects on Letterman run

Retired Science teacher Lee Marek made a name for himself performing explosive experiments with David Letterman. He tells CNN about his time.