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A current problem
looks at the eddies and currents, from the pungent problem of sewage outflow to the search for bodies of people who have fallen into rivers, explaining that fluid mechanics lies behind it all.
Finding your place in the world
What are global coordinates?
How stupid systems can use clever ways of finding things.
Why wait a second?
Why today is 24 hours and 1 second long.
Maths in a minute: The Navier-Stokes equations
The mathematical problem with turbulence.
Another way of voting
Should we let go of the "one person, one vote" principle?
Tweets by @plusmathsorg
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