France, US commemorate centenary of historic Marie Curie visit

by Lucie AUBOURG WASHINGTON, United States (AFP) — In 1921, the celebrated French scientist Marie Curie made a six-week trip to the United States, where she visited the White House and received from the hands of the president himself a very unusual gift: a gram of radium. At the time, the radioactive element was extremely hard to extract from minerals and could cost more than ten times as much as a diamond of the same […]