World Environment Day, launched by the conference, has been celebrated on June 5 each year since 1973.
On this day in 1851 Henry David Thoreau posits in an address to the Concord Lyceum his famous thesis that "in Wildness is the preservation of the World."
The tremor and fires resulting from it destroyed 80 percent of the city.
The volcano, which began rumbling on Apr. 5, killed almost 100,000 people directly and indirectly.
On this day in 1453, Leonardo da Vinci was born. Besides being an artist, he was also a scientist and engineer, often called the exemplary "Renaissance Man."
The CCC planted nearly three billion trees across the country, constructed more than 800 parks, updated fire fighting methods for forested areas, built dams, and built public roadways.
Naturalist Jim Fowler was born today. He was part of the groundbreaking wildlife television show called "Mutual of Omaha's Wild Kingdom" from 1963-1988.
World Health Day is seen as an opportunity to draw worldwide attention to a subject of major importance to global health each year.
Known as the Hudsonville-Standale Tornado, it was part of a large, deadly outbreak of 49 tornadoes that affected the Great Plains, parts of the South, and the upper Midwest.
Thousands of people, mostly women, broke into shops and began seizing food and other items before the militia arrived to stop them.