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The skull was unlike anything seen before, having a flattened cranium with a heavy brow ridge above large eye sockets.

near Dusseldorf, Germany uncovered a skull and bones.It wasn't until well into the 20th century that enough information had accumulated about the rate of radioactive decay that the age of rocks and fossils in number of years could be determined through radiometric age dating.This activity on determining age of rocks and fossils is intended for 8th or 9th grade students.Lavoisier noted the overall weight of the jar was unchanged and that when it burned, the diamond had combined with oxygen to form carbon dioxide.He concluded that diamond and charcoal were made of the same element – carbon.

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