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Forces of Nature with Brian Cox

Why is iron in our blood important? - Forces of Nature with Brian Cox: Episode 3 - BBC One

Our red blood is rich in iron, but what does that actually do? Prof Brian Cox explains that the iron in our blood does the same kind of thing as old rusty iron.

We all know H20 is water, but what does that actually mean? Professor Brian Cox explains more.

Professor Brian Cox explains how every living thing is made up of just a few ingredients.

Forces of Nature with Brian Cox BBC One

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