News
- Health & Medicine
Blood Booster: Growth signal shifts cord stem cells into high gear
A protein called Delta-1 stimulates stem cells in umbilical cord blood to proliferate in a lab dish, attach well to bone marrow when implanted into mice, and even proceed to the animal's thymus to become T cells.
- Earth
Air-Pollution Pileup: Mediterranean endures emissions from afar
Although most Mediterranean countries aren't big polluters, the area is a crossroads for pollution-carrying air currents from Europe, Asia, and North America.
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Outmuscled: Muscles, not nerve cells, fail in old worms
In aging worms, the nervous system stays intact but muscles don't.
- Astronomy
Cloudy Findings: A new population shows up in the Milky Way
A radio telescope has detected a previously unknown population of hundreds of hydrogen clouds in the gaseous halo that surrounds the disk of our galaxy.
- Anthropology
Ancient Lure of the Lakes: Early Americans followed the water
Archaeological investigations in Chile indicate that beginning around 13,000 years ago, early American settlers lived at high altitudes during humid periods, when they could set up hunting camps on the shores of lakes.
- Physics
Neptunium Nukes? Little-studied metal goes critical
Researchers have measured with far greater accuracy than ever before how much neptunium it would take to make a bomb.
- Physics
Magnetic snap gives ions extra pop
Magnetic fields pump heat into ions when field lines of opposite orientation snap and reconnect.
- Physics
Groovy ’70s sound keeps X rays tight
Cast aside as a way to reproduce music, LP phonograph records reveal another, unsuspected talent that scientists plan to exploit-focusing X rays.
- Math
Whirling to a chaotic finale
A black hole paired with another body can succumb to chaos when they orbit each other, making it more difficult to detect gravitational waves produced by such objects.
- Math
Traffic woes of the single driver
At moderate traffic volumes, a single car moving at randomly fluctuating speeds can cause traffic jams in its wake.
- Math
Spinning to a rolling stop
Air viscosity makes the rolling speed of a spinning, tipping coin go up as its energy goes down until the coin suddenly stops.
- Health & Medicine
A different GI link to colon cancers
Diets rich in sweets and other quickly digested carbohydrates appear to increase an individual's risk of developing colon cancer.
