Holograms and illusions
Here, a scientist at the U.S. Department of Energy's Fermi National Accelerator Laboratory (Fermilab) works on the so-called Holometer experiment, which will use twin laser interferometers to test whether the universe is a 2D hologram. [Read the full story.]
How it works
Optical systems (not shown here) “recycle” laser light to create a very steady, intense laser wave. Scientists can then measure the holographic "jitter" of the space-time the two machines share.