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Facebook’s study shows that even on an online social network that is supposed to cross the boundaries of geography and age, people tend to befriend others their own age, as well as people in the same country.

if you limit the analysis to a single country, the “four degrees of separation” theory shrinks even further, with most pairs of people being only separated by 3 degrees.

Stephen Heppell: "I guess I've sort of answered that, but let me say this in closing. We seem to have an education system built on 'met before' practice. Children in the exam room hoping there will be no surprises, teachers outside hoping they have prepared the children for everything. In practice we are in a world where we have not met before any of the current challenges: global warming, economic collapse, etc. And when these unexpected things happen, all folk seem to be able to do is carry on as before: the banks paying bonuses, people burning fuel etc. "To solve the 21st century's problems will take all our ingenuity, innovation, creativity and delight. And will need every single learner. The only certainty is that to carry on doing the 'old' way would be a reckless and foolish gamble. That is why I can be so certain that learning will and can change...

Coordinates “What happened yesterday is not the same as what happened today, no matter how similar the two days seem ...”