3 January 1999

The Mars Polar Lander is launched by NASA. The Mars Polar Lander (MPL) was a NASA spacecraft designed to study the polar regions of Mars….

15 February 1999

Pluto crosses Neptune’s orbit, ending a nearly 20-year period when it was closer to the Sun than the gas giant; Pluto is not expected to…

28 May 1999

In Milan, Italy, after 22 years of restoration work, Leonardo da Vinci’s masterpiece The Last Supper is put back on display.

10 June 1999

Kosovo War: NATO suspends its airstrikes after Slobodan Miloševi? agrees to withdraw Serbian forces from Kosovo.

23 April 1999

NATO bombs the headquarters of Radio Television of Serbia, as part of their aerial campaign against the Federal Republic of Yugoslavia.

16 July 1999

John F. Kennedy Jr., his wife, Carolyn, and her sister, Lauren Bessette, died when the Piper Saratoga PA-32R aircraft he was piloting crashed into the…