Which statements correctly locate the formation of the Earth and the appearance of the first humans on the cosmic calendar, which compresses the 14-billion year history of the universe into one "year," where "now" is exactly midnight, Dec 31?
A) Earth forms in early September, life begins in November, and humans appear on Dec 15.
B) Earth forms in January, life begins in September, and humans appear in October.
C) Earth forms in early September, life begins in late September, humans appear a few hours before midnight, Dec 31.
D) Earth forms in January, life begins in April, and humans appear in early December.

Question

Quizplus · Accepted Answer

According to the cosmic calendar, the formation of the Earth is placed in early September and the appearance of the first humans is just a few hours before midnight, Dec 31. The option that correctly places the formation of life between these two events is also C, which says life begins in late September. Options A, B, and D place these events in incorrect months.

Which Statements Correctly Locate the Formation of the Earth and the Appearance