New project: I Don't Understand on YouTube

Hello hello. I've just started a new project -- an educational channel on YouTube.

The first episode of I Don't Understand is now up, featuring an interview with Dr. Elizabeth Smith at the Australian Opal Centre in Lightning Ridge, NSW, Australia. Dr. Smith explains how crayfish (yabbies) use secret stores of calcium that they keep inside their heads to allow them to generate new exoskeletons as they grow.

You can find I Don't Understand in various places, including YouTubeTwitter and Facebook.