Movements and exercises that place stress on bones help to form additional calcium deposits and stimulate bone forming cells.

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Beginning this month the Hoechst-Ariad Genomics Center will test some 30, 000 genes for activity in forming bone cells.

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The researchers found the enzyme, pyruvate kinase, switches between providing fuel for existing cells and forming material for new cells.

BBC: Enzyme switch may help 'slow cancer tumour growth'

In Arkansas, wind shears and unstable weather conditions suitable for forming super cells, extremely large cloud systems capable of generating powerful tornadoes, were approaching Little Rock.

CNN: Severe thunderstorms sweep the Mississippi Valley

When gluten hits the gut in someone with celiac disease, it sets off an immune reaction which kills off the cells forming the inner lining of the small intestine.

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It has previously proved difficult to study telomerase in close detail because the enzyme tends to clump together outside of cells, preventing it from forming the ordered crystals necessary for structural analysis.

BBC: NEWS | Health | Cancer agent mysteries revealed

Other brain cancer cells, by contrast, were incapable of forming new tumors, no matter how many were injected into the mice, Dirks wrote last month in the journal Nature.

FORBES: Cancer Killer

It turns out that brain cells called neurons that are next to damaged brain areas can reconnect pathways between other neurons, forming new circuits that can resume some of the lost function.

CNN: The brain's amazing potential for recovery