CircleCare On This Day – 1st March 1896 Published On: March 1, 2018 | Last Updated On: November 26, 2020 /On This Day CircleCare Antoine Henri Becquerel, a French physicist, Nobel laureate discovered the first evidence of radioactivity on this day. On This Day CircleCare Circle Care, circlecare, Henri Becquerel, on this day, Radioactivity