Three American scientists have just been awarded the Nobel Prize for their space-time breakthrough, and LIGO team astrophysicist Gabriela González tells us about all the researchers, work and technology that contributed to it.

How do you build a real-world machine to test the most abstract of theories? Janna Levin talks with Rai Weiss, one of the original designers of LIGO, the four-kilometer-long sensors that have now twice detected the distant reverberations of two black holes crashing into one another.