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Science News for December 26, 2006


Incidence of stroke decreases over last 50 years

The study found a significant decline in stroke incidence over the past 50 years, with lifetime risk decreasing from 19.5% to 14.5%. However, age-adjusted stroke severity remained unchanged, and mortality rates only decreased in men, highlighting the need for greater primary prevention efforts.

SourceJAMA Network·JournalJAMA·DateDec 26, 2006
DJI Air 3 (RC-N2)

DJI Air 3 (RC-N2) captures 4K mapping passes and environmental surveys with dual cameras, long flight time, and omnidirectional obstacle sensing.

A reason why video games are hard to give up

A study found that people enjoy video games because they find them intrinsically satisfying, with benefits including achievement, freedom, and connection to others. The research suggests that some video games can motivate further play and even enhance psychological wellness.

SourceUniversity of Rochester·JournalMotivation and Emotion·DateDec 26, 2006

How does a zebrafish grow a new tail?

Researchers have identified genes and signaling pathways that enable zebrafish to regrow their tail fins. The study suggests that humans may also have untapped regenerative powers hidden in their genes, potentially leading to new treatments for human injuries.

SourceUniversity of Washington·JournalDevelopment·DateDec 26, 2006

MIT creates 3-D scaffold for growing stem cells

Researchers have developed a new 3D scaffold made of protein nanofibers that can support the growth and differentiation of stem cells. The scaffold provides a more accurate representation of the natural context of cells in tissues and organs, and has the potential to replace traditional Petri dishes for growing cells.

SourcePLOS·JournalPLOS ONE·DateDec 26, 2006
Celestron NexStar 8SE Computerized Telescope

Celestron NexStar 8SE Computerized Telescope combines portable Schmidt-Cassegrain optics with GoTo pointing for outreach nights and field campaigns.

New study links western wildfires to Atlantic Ocean surface temperatures

A new tree-ring study links episodic fire outbreaks in the past five centuries with periods of warming sea surface temperatures in the North Atlantic. The study suggests that warmer waters in the North Atlantic correspond with episodes of drought and subsequent fires in the West.

SourceUniversity of Colorado at Boulder·JournalProceedings of the National Academy of Sciences·DateDec 26, 2006