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Sunday - Friday 10/10:30 NT*
Saturday 6 p.m. ET*
(*except in Ontario-East where viewers will see their local CBC News)

Watch on CBC News Network

Monday - Friday 9 p.m. & 11 p.m. ET/PT
Saturday & Sunday 9 p.m. ET/PT

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View live broadcasts in the CBC video player at the following times

Sunday - Friday Live stream 9-10 p.m. ET
Saturday Live stream 5 -6 p.m. ET

Recorded broadcasts are posted at the following times

Sunday - Friday Full broadcast 11:15 p.m. ET (approx.)
Saturday Full broadcast 6 p.m. ET

What's your science question for Bob McDonald?

Submissions are now closed.  Thanks to everyone who participated.

Be sure to watch the special science edition of Mansbridge One on One, where Bob McDonald answers your science questions.  Airs March 26 and 27 on CBC News Network.  Check the Mansbridge One on One page for air times, and to watch the video online after the broadcast.

Watch Bob McDonald's special -  Magical Mystery Cures - a fun-filled, guided tour of various anti-aging products and their extravagant promises to make you feel better, younger, smarter, more vigorous, and more beautiful.
  Available on demand at