The big bang theory suggests that the universe is about million years old4.6 billion years old30 billion years old13 billion years old

13 billion years old

Explanation:

Big ban theory is the theory that explains the things occurred at the origin our our universe. It explains the movement of the galaxies It also tells us the age of our universe. According to this theory, our universe is 13 billion years old. The temperature of our universe was about 5.5 billion Celsius at the start of the universe.

28. evolution

29. environment, survive, offspring  

explanation:

ill do it for 100, also this isnt 80 its 40