What is callisthenics? And how does it compare to running or lifting weights?
Callisthenics exercises offer some of the cardio benefits of a run, and some of the muscular benefits of a lifting session.
Spanish 'running of the bulls' festival reveals crowd movements can be predictable, above a certain density
The collective motion of large crowds may be predictable past a certain density of people in a given area, according to a study published in Nature. The findings, based on four years of observations ...