The original paper is here: https://journals.aps.org/prx/pdf/10.1103/PhysRevX.14.021022 https://journals.aps.org/prx/pdf/10.1103/PhysRevX.14.021022 It's worth

The original paper is here: https://journals.aps.org/prx/pdf/10.1103/PhysRevX.14.021022 https://journals.aps.org/prx/pdf/10.1103/PhysRevX.14.021022 It's worth a look. The article buries a lot of interesting details. For example: "These bodies are shaped like dumbbells, with each end weighing less than a gram..." But in the paper we read: "We are thus experimenting with gold spheres of mass m ≈ 1.58 × 10^−10 kg" So yeah, that's "less than a gram" but that's kind of like saying that a gnat weighs less than a ton. It's not wrong, but it kinda buries the lede. This experiment sounds really cool and promising. We're looking at Nobel-Prize-worthy results if it works out. [UPDATE] It's actually going to be even more Nobel-Prize-worthy than I thought. Turns out they're not going to be doing this experiment any time soon: "Admittedly, this is a very challenging condition to achieve experimentally. Considering temperatures in the order of millikelvin, e.g., achievable by attaching the pendulum to a dilution refrigerator, this would still require quality factors on the order of Q = 10^10. This is 5 orders of magnitude above the largest reported quality factors for torsion pendula. For some types of wire materials, such as sapphire, improvements in quality factors are to be expected from operation at lower temperatures." Imagine making a wire out of sapphire!