Award-winning documentary takes us inside the National Science Foundation's Laser Interferometer Gravitational Wave Observatory (LIGO), where scientists are revolutionizing the field of gravitational wave astronomy and space discoveries.
There was an article from Nature.com in September 2015 that LIGO had detected gravity waves but apparently it hasn't happened yet.
Anyway, 'Einstein's Messengers' is a cool program that first reminds us that gravity is NOT two objects attracting each other, as we often think, but rather, gravity is the result of an object with mass distorting the space/time fabric around it. We learn that when really massive bodies interact, the resulting space/time distortion spreads out in "waves" similar to a pebble dropped in a pond. An article in Space.com from May 2013 states the idea eloquently:
"When two extremely dense objects, such as neutron stars (stars so dense the protons and electrons in their atoms collapse to form neutrons) or black holes, orbit each other in binary pairs, their interactions should create ripples in the fabric of space-time called gravitational waves."
This is what LIGO is trying to measure, and the program explains how they are going about doing that.
The program was produced in 2007. If you google "results from LIGO" you get a Wiki article nicely detailing the history and evolution of the LIGO project, with a notation that the latest sensitivity upgrades "... will be further enhanced until it reaches design sensitivity around 2021". The search string also uncovers several links to blogs and articles covering LIGO, such as the aforementioned space.com essay.
Not the worst 21 mins of Amazon Prime viewing I've had. If you want to learn more about gravity wave experiments, research Stanford's Gravity Probe B experiment. It was launched into orbit to look for gravity waves on the shuttle. It uses many of the same principles demonstrated in this video.