No one knows exactly where or when lead was discovered. What is known is that by Roman times, lead was being widely used, so scientists to believe it has been around for thousands of years. More »

According to Jefferson Lab and Chemistry Explained, it is not possible to tell exactly who discovered lead, however, it has been in use since before Roman times. According to Chemistry Explained, lead sulfide, PbS, is a ... More »

No one knows how lead was discovered. It was known to the ancients and is mentioned in the Bible. Scientists believe that lead was discovered as a by-product of mining other metals, such as copper. More »

www.reference.com Science Earth Science

No one is completely sure about the specific time or location of the discovery of tin because it was discovered very long ago. Tools, weapons and figures made of metals including tin have been found and dated as far back... More »

No one knows how lead was discovered. It was known to the ancients and is mentioned in the Bible. Scientists believe that lead was discovered as a by-product of mining other metals, such as copper. More »

www.reference.com Science Earth Science

Historians do not know for sure just how fire was discovered, but most believe that humans first saw fire after lightning struck a tree during the Lower Paleolithic age. Soon, humans discovered that it was possible to no... More »

While observing a solar eclipse in 1868, astronomer Pierre Janssen noticed bright yellow lines in the Sun's chromosphere. He concluded that the chromosphere was gaseous and that it could be studied in the absence of an e... More »