3. The Universe’s Accelerating Expansion
In 1998, two independent teams of astronomers made a stunning discovery: the universe’s expansion is not slowing down but accelerating.
This revelation, recognized by the Nobel Prize, shocked the scientific community and challenged previous assumptions about cosmic fate.
To explain this acceleration, scientists revisited Einstein’s once-rejected cosmological constant.
Suddenly, Λ was no longer a blunder—it became a crucial ingredient in our understanding of the cosmos, hinting at a mysterious force now called dark energy.