Each person's gut carries a different collection of bacteria-infecting viruses that may benefit their hosts, researchers report. The viruses contain DNA fragments whose functions include cell repair and food processing.

• More Info

This video illustrates what happens when a new science delivers on its promise? As terminal cancer patients begin to respond to an experimental drug, new hopes and challenges emerge. For the melanoma patients who signed on to try a drug known as PLX4032, the clinical trial was a last resort. Their bodies were riddled with tumors, leaving them almost certainly just months to live. But a few weeks...

• More Info

In this video, after surgeries and chemotherapies failed, the last hope for Sam Spero, a cancer patient, is an experimental drug with high promise. The first in a series.

• More Info

Cell biologists often seem like modern-day alchemists. Instead of turning lead or straw into gold, they're looking for ways to turn one kind of cell into another, potentially more useful, cell. Now, one research team has found a way to turn a very common heart cell into a cell missing in injured hearts.

• More Info

As in civil society, where there must necessarily be checks and balances on freedom of expression, cells have evolved a range of mechanisms to regulate the expression of their constituent genes. This video presentation, an accompaniment to Science's 28 March 2008 special issue on gene regulation highlights the central role of RNA in gene regulation.

• 
• More Info