In memory of Stephen Hawking

I still remember well. I had just turned 14. My parents explained to me that I was no longer a child to receive presents on my birthday. I agreed, in silence. It was the end of the 80s, and I understood life was hard. By D., from Russia.   I think they...

The universe is not dying!

  A terrible discovery was announced recently: our universe would presumably be dying! A study of more than 200,000 galaxies by astronomers from several countries, using some of the most powerful telescopes in the world, shows that the universe is producing half as much energy as it did 2...