People breathe in oxygen and exhale carbon dioxide - that’s the respiratory cycle as it’s long been known.
But researchers in Cleveland say there’s more to the story, and it may be time to rewrite the text books.
In this week’s Exploradio, WKSU’s Jeff St.Clair reports that one other gas is necessary for life.
Dynamite and chest pains
What do dynamite, Viagra, and new born babies all have in common?
They all use the power of NO.