"Early Universe: Quasar 'Clocks' Reveal Time Ran Five Times Slower After Big Bang"

Scientists have used quasars as "clocks" to observe the early universe running in extreme slow motion, confirming Einstein's theory of general relativity. By analyzing data from nearly 200 quasars, researchers found that time appeared to flow five times slower when the universe was just over a billion years old. This discovery provides insight into the expansion of space and confirms the concept of an expanding universe. Quasars can now be used as standard markers of time for studying the early universe.