Today in History – June 25, 1903 – Marie Curie defends her doctoral thesis, then gets Nobel Prize five months later. Did she just procrastinate? Or were thesis standards higher a century ago at the Sorbonne? I haven’t seen a good explanation for the delay, other than she was busy discovering new […]

Today in History - June 8, 1940 - The discovery of element 93, neptunium (symbol Np), a decay product of uranium-239, was announced by Edwin M. McMillan and Philip H. Abelson working at the University of California at Berkeley. Neptunium was named after the planet Neptune and, at the time, was the first […]

Today in History – June 4, 1937 – First shopping cart invented by Sylvan Nathan Goldman. Goldman was a retailer who wanted his shoppers to be able to carry more goods to the cash register and increase sales. The standard wicker basket limited the number of purchases a shopper could conveniently carry. In […]