video: Angular variations of the density and speed waves propagating in the start corrals of the 2016 and 2017 Bank of America Chicago Marathons, the 2017 Schneider Electric Paris Marathon and the 2017 Atlanta Peach Tree Road Race. This material relates to a paper that appeared in the 4 Jan. issue of Science, published by AAAS. The paper, by Nicolas Bain at Univ. Lyon in Lyon, France, and colleagues was titled, "Dynamic response and hydrodynamics of polarized crowds." view more
Credit: [Credit: Nicolas Bain and Denis Bartolo]