Cosmic History | NASA Science | "Around 13.8 billion years ago, the universe expanded faster than the speed of light for a fraction of a second, a period called cosmic inflation"
The problem of cosmic inflation and how to solve it
U.S. Ends Support for CMB-S4 Project to Study Cosmic Inflation
U.S. abandons hunt for signal of cosmic inflation
'Cosmic inflation:' did the early cosmos balloon in size? A mirror universe going backwards in time may be a simpler explanation
