What is a cell and why are they so small

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What you'll learn

A 15-minute video from Lisa Johansen: “What is a cell and why are they so small”.

Science & Math

Video by Lisa Johansen, played through YouTube's embedded player.

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Chapter 13 ppt MF IF microscopy

Lisa Johansen

A 32-minute video from Lisa Johansen: “Chapter 13 ppt MF IF microscopy”.

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Action potential - all or nothing

Lisa Johansen

A 13-minute video from Lisa Johansen: “Action potential - all or nothing”.

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A visual introduction to the Fourier transform: winding a signal around a circle to find its frequencies.

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Gödel's incompleteness, Turing's halting problem and the limits of mathematics.

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