October 1, 2024, Madrid, Spain: A protester speaks through a megaphone while holding a Spanish flag during a demonstration. The first International Summit on Longevity was held in Madrid at the Grand Amphitheatre of the Illustrious Official College of Physicians of Madrid and it ended with a march through some of the central streets of the Spanish capital. (Credit Image: © David Canales/SOPA Images via ZUMA Press Wire)