The Carnival of Mathematics is a collection of recent math blog articles covering visual math, various rants and some math history, by various authors.

The updated applets on the Graphs of tan, cot, sec and csc page now run on mobile devices, albeit rather slowly. One of the most popular pages on IntMath.

What is the length of a spiral around a paraboloid? This is an interesting application of integral calculus, involving an environmentally friendly cooker design.

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