Question

according to the 1 - year calendar model based on the big bang theory, which of the following events happened at the end of the year, on december 31?
a.) the big bang occurred.
b.) life appeared on earth.
c.) the solar system was created.
d.) homo sapiens first appeared.

Explanation:

In the 1 - year calendar model based on the Big Bang theory, the Big Bang occurred at the start of the year. The creation of the solar system and the appearance of life on Earth happened much earlier in the timeline compared to the appearance of Homo sapiens. Homo sapiens are a relatively recent development in the history of the universe.

Answer:

d.) Homo sapiens first appeared.