Of course. No one was actually there.
Ethanol was first discovered by alchemists in the Middle Ages through the process of fermentation. However, its use as a recreational beverage dates back to ancient civilizations such as the Babylonians and Egyptians.
Indigenous peoples have been living in the Amazon rainforest for thousands of years, with some estimates suggesting their presence dates back over 10,000 years. They have developed deep connections to the land and ecosystems, shaping their cultures, traditions, and ways of life in harmony with the environment.
Galena was known to ancients, so its discovery and discoverer remain uncertain. The ancient Egyptians used it around their eyes to cut glare, and it was know to them as kohl. A link can be found below to learn more about this sulfide mineral, which is the most important ore of lead.
Clay is a common componet of soil, it has always been known about, as long as humans have existed they have known about clay. The same answer could have been given if you had asked when was wood, or water discovered.
Zinc pennies were first minted in 1982, and since then, all pennies have been made of zinc with a copper coating. So, the acceptable range of mint dates for a zinc penny is 1982 to the current year.
Prehistoric - 2010 was released on: USA: 28 February 2010
Prehistoric Disasters - 2009 was released on: USA: March 2009
Prehistoric Perils - 1951 was released on: USA: 28 December 1951
Prehistoric Super Salesman - 1969 was released on: USA: 1 September 1969
Jungle of Prehistoric Animals - 1924 was released on: USA: 28 March 1924
Prehistoric - 2010 Los Angeles - 1.1 was released on: USA: 22 November 2010
Boo - 2003 Bedroom Prehistoric Land was released on: USA: 7 February 2007
Prehistoric - 2010 Dallas 1-3 was released on: USA: 24 November 2010
Svengoolie - 1995 Women of the Prehistoric Planet was released on: USA: 18 May 1996
Sackboy's Prehistoric Moves - 2010 VG was released on: USA: 7 December 2010
The Croods Prehistoric Party - 2013 VG was released on: USA: 19 March 2013
Svengoolie - 1995 Monster from a Prehistoric Planet was released on: USA: 8 July 2006