If your mucus is gray or black... …you likely inhaled dark-colored particles, like smoke from a fire or heavy exhaust.

A giant cat mural has been painted by a street artist in Sheffield city centre. The black-and-white image of a malevolent ...

Molecular cloaking mechanism unveils the iconic partnership between anemonefish and anemones. The symbiotic relationship ...

Microplastics are everywhere. Meanwhile, colorectal cancer rates are rising in young adults. Could there be a connection?

When a white blood cell finds a germ, it latches onto it. Then it changes its shape to surround the germ. You can imagine the ...

When a person has black or dark-colored mucus, they may have inhaled potentially harmful pollutants. Coughing up black mucus may also be due to an underlying infection or condition. Mucus serves ...

If the white part of the eye is swollen and appears jelly-like, it may indicate a condition called conjunctivitis, also commonly known as pink eye. Conjunctivitis is an inflammation of the ...

First, it’s important to know that fish are covered in a thin layer of mucus. This slimy coating (it is also called a “slime coat”) is known to keep fish healthy by warding off pathogens.

This cold and flu season, you may be looking for clues you're getting better anywhere you can find them, even in the color of ...