Restorers used the ancient Egyptian method of construction by utilizing interlocking blocks to repair the Great Pyramids. Up to that point, modern cement had caused further damage to the structures because the concrete's water further eroded the limestone.
January 24, 1984
Steve Jobs introduced the Apple Macintosh at the Apple annual stockholders meeting in Cupertino, CA. This was the first personal computer to use a graphical interface with mouse instead of a command line interface that was commercially successful. It sold for US$1,995-2,495.
March 28, 1984
Owner Bob Irsay moved the Baltimore Colts to Indianapolis quietly in the night after the city refused to pay for the renovation of the football stadium.
June 8, 1984
Who ya gonna call? Dan Akroyd and Bill Murray exterminated ghosts and other supernatural beings in the summer hit Ghostbusters.
July 1, 1984
Los Angeles, CA
The Motion Pictures Association of America (MPAA) began to rate films with content 'inappropriate for children under 13 years old' as PG-13. The MPAA, which consisted of parents from diverse backgrounds, first started rating films 16 years earlier.
October 26, 1984
Loma Linda, CA
Dr. Leonard L. Bailey replaced a 14-day old infant's deficient heart with a baboon's. Living longer than previous patients who had animal heart transplants, Baby Fae succumbed to heart failure 20 days later.