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"Optical illusions are more than just a bit of fun. Scientist Beau Lotto is finding out what tricking the brain reveals about how our minds work. Here he explains his findings. "

"In 1975, a new word came into use, when a maverick mathematician made an important discovery. So what are fractals? And why are they important? "

Fun, interactive, research-based simulations of physical phenomena from the PhET project at the University of Colorado.

In this documentary, Professor Jim Al-Khalili sets out to uncover one of the great mysteries of science - how does a universe that starts off as dust end up with intelligent life? How does order emerge from disorder? It's a mind bending, counter intuitive and for many people a deeply troubling idea. But Professor Al-Khalili reveals the science behind much of beauty and structure in the natural world and discovers that far from it being magic or an act of God, it is in fact an intrinsic part of the laws of physics. Amazingly, it turns out that the mathematics of chaos can explain how and why the universe creates exquisite order and pattern.