Outside work: get a feeling for a hectare and how much arable land there is.

  If you have never tried it, this exercise, which can be done with schoolchildren, is quite enlightening, and something you can map out on the school playing field:   One hectare can be easily understood if you are a small group and stake it out in a fairly large open space. Imagine you are … Continue reading

More on radius

Holding hands around the world

This problem was given to me during the Future Perfect festival I thought I would post it… If we who live on Earth stand and hold hands with each other, would we be able to form a circle around the Earth? Given that the average comfortable reach is about 1,2 meters hand to hand. Given … Continue reading