Mountain adventures promise stunning views and unforgettable memories, but ascending to high elevations triggers profound ...

What happens when you hold your breath goes far beyond that quick dizzy spell. From plummeting oxygen levels to unexpected ...

In addition to a careful exam, hearing testing and an MRI of the brain is generally recommended. Early treatment with ...

Red blood cells (RBCs) play a central role in keeping your body energized and functioning. They carry oxygen from your lungs ...

Every breath we take in contains 21% oxygen, the gas that makes life on Earth possible. Oxygen, in its combined oxide state, ...

Earth’s magnetic field seems to correlate with conditions that helped complex life to thrive — a discovery that could aid the search for life on distant exoplanets.