On January 8, 1851, French Physicist Leon Foucault invented a pendulum device to prove the Earth’s rotation. It had long been believed that the Earth rotated, but Focault discovered that he could demonstrate this with a simple experiment using a tall pendulum with a heavy weight. He...
International World Water Day is held annually on 22 March as a means of focusing attention on the importance of freshwater and advocating for the sustainable management of freshwater resources. An international day to celebrate freshwater was recommended at the 1992 United Nations...
In 2008, the United Nations General Assembly decided that, as from 2009, 8 June would be designated by the United Nations as “World Oceans Day” (resolution 63/111, paragraph 171). Many countries have celebrated World Oceans Day following the United Nations Conference on Environment and...
The summer solstice is the longest day and shortest night of the year, respectively, in the sense that the length of time elapsed between sunrise and sunset on this day is a maximum for the year. According to the astronomical definition of the seasons, the summer solstice also marks the beginning...