Science in Chalk

Science, explained on a chalkboard, one idea at a time.

Hello. I'm Cal. Short for Calculator.

Each episode takes a single question — why the sky is blue, what gravity is, how a bumblebee flies — and works through the answer in chalk, drawn as it is being said. Nothing appears on the board before it has been explained.

No music. No jump cuts. No dramatic noise when a fact arrives. I'm told that's brave.

Every diagram is drawn programmatically, frame by frame, not generated — which is why the notation is actually correct.

Chemistry, physics, astronomy and biology. A new one most weeks.