Where did the universe begin and how did it come back into existence?

Well, honey, some folks say the universe began with the Big Bang about 13.8 billion years ago, but honestly, no one was around with a stopwatch to confirm that. As for how it came back into existence, well, the universe didn't quite pop back into existence—it's always been here in some shape or form, evolving and changing over billions of years. So grab some popcorn, sit back, and enjoy the show!