A 57-year-old man received the first transplanted heart from a genetically modified pig.
Source
French forces attacked Calais and took it back from English rule.
President Truman announced to the people of America that they successfully developed a hydrogen bomb.
The US celebrated the opening of the country's first railroad station in Baltimore.
Beyoncé and Jay-Z welcomed their daughter, Blue Ivy Carter, into the world.
Galileo discovered the first three satellites of Jupiter.
