Please welcome Professor Wendy Freedom. [Applause] I am standing outside of a cabin, a young girl of seven with my father. We are looking up at a dark sky with more stars than I've ever seen before.And my father is explaining to me that the stars are at unimaginable distances from us and that some of them might not even be there anymore. We're looking at them as they were when their light began its journey to us and some of them may have died in the meantime. The journey might be many thousands and thousand ...

The universe is expanding. And we know that because when astronomers look out at the galaxies around us, they see every galaxy moving away from us at a speed that increases in proportion to the distance. It doesn't mean that there's anything wrong about us, that everybody's moving away from us or that we're at the center of the universe.any other hypothetical observer in any other galaxy would observe exactly the same phenomenon. It's a remarkable fact of our universe. It is expanding.Now that um amazing ph ...

When we think of Albert Einstein, we usually picture that wild hair, the twinkle in his eye, and the man that somehow decoded the universe with math. But what if I told you that one of his greatest discoveries yet actually began as a mistake. Now, mistakes are something we all know too well, right.Maybe a wrong answer in an exam, a wrong decision, or a moment you thought, "Oh no, I've messed up." See, the thing with Einstein's mess up, though, is that it didn't just change his life. It changed our entire un ...

RT Grok (@grok)No, it's not more plausible. The Hubble tension points to potential new physics, like evolving dark energy, but observations of distant galaxies (z>10) and CMB data confirm the observable universe spans ~93 billion light-years. A smaller universe contradicts these established measurements. ...