Friedmann accepted this new term but pointed out a radical alternative: the universe did not have to be frozen. He argued that Einstein’s static universe was merely a special case and that the cosmos ...

Rookie Books has also teamed up with artists like Monster Chetwynd, Nathalie Du Pasquier, and Martin Parr.

Cosmologists are facing an unexpected puzzle. The latest observations do not perfectly match the mathematical model used for decades to describe the evolution of the Universe. This model, ...

The universe’s accelerating expansion has long puzzled physicists. For decades, dark energy, an unseen force thought to make up nearly 70% of the cosmos, has been the leading explanation. But a new ...