RXTE Homes in on a Black Hole's Jets

(PhysOrg.com) -- For decades, X-ray astronomers have studied the complex behavior of binary systems pairing a normal star with a black hole. In these systems, gas from the normal star streams toward the black hole and forms ...

How do you mend a broken heart?

Damaged heart tissue is not known for having much inherent capacity for repair. But now, scientists are closing in on signals that may be able to coax the heart into producing replacement cardiac muscle cells. Using a zebrafish ...

Mitochondrial cooperatives

Mitochondria, the organelles that supply the cell with energy, are highly dynamic and can link up to form complex tubular networks. A new study shows that this response can transiently compensate for a shortfall in energy ...

Warming 'seesaw' turns extra sunlight into global greenhouse

(Phys.org)—Earth's most recent shift to a warm climate began with intense summer sun in the Northern Hemisphere, the first pressure on a seesaw that tossed powerful forces between the planet's poles until greenhouse gases ...

Predictability: The brass ring for synthetic biology

(Phys.org) —Predictability is often used synonymously with "boring," as in that story or that outcome was soooo predictable. For practitioners of synthetic biology seeking to engineer valuable new microbes, however, predictability ...

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