Physics can feel inscrutable to students; this lesson helps them understand a graphing problem by analyzing their own ...

I started breaking down human anatomy into simple forms to improve my figure drawing. In this first part, I focus on basic ...

In this video I see how fast we can get a radiometer to spin by shining the world's brightest flashlight on it. Then I talk about the real reason the Crookes radiometer spins when you shine light on ...

In the late afternoon light, about 20 kilometres from Doha, the Al-Thumama complex looks like any quiet residential neighbourhood: paved pathways, rows of apartment blocks, the hum of air-conditioning ...