A crowd scientist is helping the Boston Marathon manage a growing field of 30,000-plus runners
FILE – Runners approach the finish line during the Boston Marathon, April 21, 2025, in Boston. Charles Krupa/AP FILE – A runner crosses the finish line of the Boston Marathon, April 18, 2022, in Boston. Charles Krupa/AP FILE – American women finishers celebrate with the crowd at the Boston Marathon, April 15, 2024, in Boston….