World population was 5,263,593,000.
The Hubble telescope was launched.
George H.W. Bush and Soviet leader Mikhail Gorbachev sign treaty to end chemical weapon production and begin destroying their stocks.
World Health Organization removes homosexuality from its list of diseases.
van Gogh's "portrait of Doctor Gachet" sold for a record $82.5 million.
Gulf War begins.
Largest art theft in U.S. history commited. Twelve paintings worth $100- $300 million stolen from a Boston museum.
Microsoft introduced Windows 3.0
"Sue", best preserved T-Rex specimen ever found is discoverd in South Dakota. (she now resides in the Field Museum in Chicago)
Tim Berners-Lee invents World Wide Web and launches first ever web page.
I don't do shirt designs but these are just a few things that happened in 1990 if anyones was born the same year as me. Not the most interesting year but I like it!