Search results
Results from the WOW.Com Content Network
Evidence of glass during the chalcolithic has been found in Hastinapur, India. [24] The earliest glass item from the Indus Valley civilization is a brown glass bead found at Harappa, dating to 1700 BCE. This makes it the earliest evidence of glass in South Asia. [3] [25] Glass discovered from later sites dating from 600 to 300 BCE displays ...
For Earth Day on April 22, interesting facts including who invented it, why it's on that date, and how it turned into a global movement. ... April 22, 2024 at 11:13 AM. ... Stash of Roman-era ...
Earth Day is an annual event on April 22 to demonstrate support for environmental protection.First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) [1] including 1 billion people in more than 193 countries.
[21] [22] Glassmaking dates back at least 6000 years, long before humans had discovered how to smelt iron. [21] Archaeological evidence suggests that the first true synthetic glass was made in Lebanon and the coastal north Syria, Mesopotamia or ancient Egypt.
A 2015 study estimated that there are roughly 3 trillion trees on earth, give or take a few million. Since there are around 8 billion people currently living on the planet, the math boils down to ...
Zero Emissions Day [127] September 21 Car Free Day: September 22 World Rhino Day [128] September 22 Ecological Debt Day (Earth Overshoot Day) September 23 in 2008, but receding World Gorilla Day [129] [130] [131] September 24 World Environmental Health Day [132] September 26 since 2011 [133] World Cassowary Day [134] [135] September 26
Morton Shelly Hilbert (January 3, 1917 – December 24, 1998) was a professor of public health, environmentalist, and co-founder of Earth Day that was first celebrated on April 22, 1970. [ 1 ] [ 2 ] He is best known for developing public sanitation systems and sanitary public healthcare facilities throughout the United States, Europe, U.S ...
The improved AEG tape-recorder "Magnetophon K4" is first used in radio studios. The belt speed is 77 cm / s, which at 1000 m length of tape has a playing time of 22 minutes. Werner Flechsig invents the shadow mask method for separate control of the three primary colors in a color picture tube. 1939