Iron is an essential trace metal for nearly all microorganisms. Microorganisms devote substantial metabolic resources to obtaining adequate iron under various environmental conditions. Systemic iron ...

The Ring Nebula, also known as Messier 57, sits about 2,000 light-years from Earth. It is a planetary nebula—a misleading ...

If you've recently gotten a blood test and your levels of hemoglobin the iron-containing protein in your blood that transports oxygen around your body came back too low, you may have a condition ...