So essentially, yellow mucus just means your immune system has been activated. For signs your cold is getting ... In fact, ...

As they turned the vehicle around, they found what appeared to be a road laid out before them, constructed of yellow brick and seemingly leading to some ancient and lost underwater civilization.

Scientists have discovered a surprisingly simple way to potentially peer inside the body, using a common yellow food dye found in Doritos to create see-through mice. In a series of experiments ...

As stated above you will find yellow road signs in a number of different places. Regulatory signs indicating restrictions are typically found on major commuter roads, such as Red Routes or outside ...