Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of what the universe looked like in the moments before it rapidly changed ...

After the Big Bang, the whole Universe was flooded with ... Because light takes time to travel through the vast distances of space, we’re looking at our galaxy as it was 27 thousand years ...

Thought to be be created by the Big Bang 13.8 billion years ago, the universe has been expanding ever since. However, the rate at which it’s expanding hasn’t been constant—as it ages ...