Neighborly care keeps stem cells young

A stem cells’ immediate neighborhood, a specialized environment also known as the stem cell niche, provides crucial support needed for stem cell maintenance. But nothing lasts forever, found scientists at the Salk Institute ...

Adult stem cells lack key pluripotency regulator

The protein Oct4 plays a major role in embryonic stem cells, acting as a master regulator of the genes that keep the cells in an undifferentiated state. Unsurprisingly, researchers studying adult stem cells have long suspected ...

New-School 'Aether' May Shed Light on Neutron Stars

Among scientists, it is widely believed that there is no such thing as an aether – a medium pervading all space that allows light waves to propagate, similar to how sound needs air or water – but a part of its spirit ...

Cassini Pinpoints Hot Sources of Jets on Enceladus

A recent analysis of images from NASA's Cassini spacecraft provides conclusive evidence that the jets of fine, icy particles spraying from Saturn's moon Enceladus originate from the hottest spots on the moon's "tiger stripe" ...

Dawn Mission Status: Spacecraft Tests Ion Engine

NASA's Dawn spacecraft successfully completed the first test of its ion propulsion system over the weekend. The system is vital to the success of Dawn's 8-year, 1.6 billion-mile (3-billion-kilometer) journey to asteroid Vesta ...

Microgrid Allows Simultaneous Study of Multiple Variables

Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have developed a method for correlating the results of microscopic imaging techniques in a way that could lead to improved understanding, diagnosis, ...

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