Nobody has ever looked at you as intensely as I have,” Euan Uglow once told a model who was posing for him. Before embarking on a painting, the British artist, who died in 2000 aged 68, would set up ...

Right now, molecules in the air are moving around you in chaotic and unpredictable ways. To make sense of such systems, physicists use a law known as the Boltzmann distribution, which, rather than ...

Contains parametric and polar plots that of epicycloid and Archimedes spiral; project file of this tutorial video. Also includes plots of epitrochoid, hypocycloid and hypotrochoid not covered in the ...