Tech Tips: A guide to upgrading, using XP computer

Microsoft retires its 12-year-old Windows XP operating system on Tuesday. Even so, there are still millions of XP computers out there. Here's what to do if you own one of them:

Running geese give insight into low oxygen tolerance

A new study into how the world's highest flying bird, the bar-headed goose, is able to survive at extreme altitudes may have future implications for low oxygen medical conditions in humans.

In blind test, soloists like new violins over old (Update)

Ten world-class soloists put costly Stradivarius violins and new, cheaper ones to a blind scientific test. The results may seem off-key to musicians and collectors, but the new instruments won handily.

Twitter buys Android lock-screen startup Cover

A young startup specializing in Android smartphone lock screens that anticipate what "app" a user might want at any give moment said Monday it has been bought by Twitter.

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