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We count in sets of ten. This seems natural to us because we have ten fingers. However the ancient Babylonians used different units, which is why we measure time in units of 60 minutes and clock-faces have 12 hours. We need not use sets of ten, any number would do. Mathematicians call this modular arithmetic. So we count in modulus ten. When perfect squares and modular arithmetic are combined strange and unexpected things happen. A...

2000-03-03

 philosophy mathematics measurement decimal Fermat nature
The 'white-coat' effect - where blood pressure rises during a check by a doctor - is even worse in someone whose level is already high, researchers say...

2010-05-07

 health blood pressure stress anxiety medicine error measurement
As a newly released study shows, people would rather pay for expedited service to get things in 31 days than they would to get it in one month.

2011-02-15

 brain psychology unit measurement number perception
What might have been the biggest physics story of the past century may instead be down to a faulty connection.

2012-02-23

 neutrino light speed measurement physics