It’s invisible and relatively cheap ... one of its byproducts is carbon monoxide, which is a deadly gas. You can tell if gas is burning with the right mix of oxygen by the color of the flame ...

Carbon monoxide can turn deadly within minutes. Learn the signs of carbon monoxide poisoning and how to stay safe.

Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short ...

In the realm of invisible threats, few are as globally underestimated as radon—a radioactive gas that seeps silently through soil, remaining undetected until its effects become deadly ...

Carbon monoxide is an invisible, odorless gas that can cause serious illness or death. It is called “the silent killer” because it cannot be seen, smelled, or tasted. Exposure to CO gas causes ...