In 1884 – Geographers and astronomers adopted Greenwich as the Prime Meridian, making it the International standard for zero degrees longitude. Today the Greenwich observatory shoots a laser northwards at night to indicate the meridian. It is not a dangerous laser.
In 1983 – Bob Barnett, president of Ameritech Mobile communications, called Alexander Graham Bell’s nephew from Chicago’s Soldier Field using a Motorola DynaTAC handset. It marked the launch of the first cellular telephone network in the US.
In 1985 – The first observation of a proton-antiproton collision was made by the Collider Detector at the Fermi National Accelerator Laboratory in Batavia, Illinois.