Unifying Gravity and Quantum Mechanics:

Quantum mechanics may seem like it is beyond our realm of experience; however, it is an integral part of the physics that governs our lives. Yet, it is not without its problems. There is one very important aspect of our everyday experience that is not described in a quantum framework-- and that is gravity. Because it keeps matter together, gravity is one of the driving forces of the cosmos -- and of life itself.

For quite some time, we have struggled with the goal of uniting gravity and quantum mechanics. Nowadays, physicists have had many ideas (some great, others not so much); however, nothing experimentally verifiable (like string theory) has surfaced. That is, until now.

Some physicists are starting to think that gravity itself is the ultimate decoherence, or the weakest form of background noise. To learn about new experiments that can help us solve this problem, see:
http://www.fromquarkstoquasars.com/unifying-gravity-and-quantum-mechanics/

Image source:
NASA