: The universe expanded from an extremely small, hot, and dense state and has been cooling ever since.
"Soft Kitty, warm kitty, little ball of fur..." — The ultimate comfort song. : The Big Bang Theory image
: The idea that the universe began as a single point, then expanded and stretched to its current size. : The universe expanded from an extremely small,
: Most physicists believe the universe was born approximately 13.8 billion years ago . The Big Bang Theory image
Images of the group eating Chinese takeout or sitting on the iconic brown sofa.
"Our whole universe was in a hot dense state..." (Theme song lyrics). "Nothing bonds people quite like the Vulcan salute. 🖖" :