How Did We Figure Out the Universe Is 13.8 Billion Years Old?
Every time someone mentions the age of the universe, the same number shows up: 13.8 billion years.
It’s one of those facts people repeat so confidently that you almost forget how absurd it really is. I mean, how could anyone possibly know the age of everything? Nobody was there at the beginning. There’s no cosmic clock floating in space. And yet somehow, astronomers ended up with a number so specific it sounds less like a guess and more like a timestamp.
What’s fascinating is that scientists didn’t measure the universe directly. They couldn’t. Instead, they watched the universe move, and then worked backward from there.
The Hubble constant is supposed to reveal the age of the universe, but modern astronomy keeps finding conflicting answers. Here’s why scient














