59:41 Which of the following is NOT an example of a primary source?
a.
The Diary of Anne Frank
b.
the sarcophagus of King Tut
c.
film footage of the Vietnam War
d.
a documentary about the American Revolution

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed