We live in a world defined by inches, feet and miles (or centimeters, meters and kilometers, if you prefer), and it’s not difficult for most of us to comprehend sizes and distances given in these ...

Scientists figured out that the universe is billions of years old — after years of reading ancient rocks and dying stars, and ...

Dark matter is an enigmatic form of matter not expected to emit light, yet it is essential to understanding how the rich ...

Our galaxy may reside in a billion-light-year-wide cosmic bubble that accelerates local expansion, potentially settling the long-running Hubble tension. Galaxy counts reveal a sparsely populated ...