A star like a Matryoshka doll: New theory for gravastars

The interior of black holes remains a conundrum for science. In 1916, German physicist Karl Schwarzschild outlined a solution to Albert Einstein's equations of general relativity, in which the center of a black hole consists ...

What is dark energy? Inside our accelerating, expanding universe

Some 13.8 billion years ago, the universe began with a rapid expansion we call the Big Bang. After this initial expansion, which lasted a fraction of a second, gravity started to slow the universe down. But the cosmos wouldn't ...

Physicists develop highly robust time crystal

A team from TU Dortmund University recently succeeded in producing a highly durable time crystal that lived millions of times longer than could be shown in previous experiments. By doing so, they have corroborated an extremely ...

Why Australian summer is getting more humid

Has Sydney felt more like Cairns lately? You're not imagining it—millions of Australians up and down the east coast have sweltered through exceptionally high humidity in recent weeks.

page 1 from 40