Perseids meteors to light up skies midweek

Perseids meteors to light up skies midweek

The rocky debris from a wandering comet is filling the sky with shooting stars these nights, just as...

$10 billion collider produces subpar results

$10 billion collider produces subpar results

When it was launched to great fanfare nearly a year ago, some feared the Large Hadron Collider would...



Spacecraft's findings on new planet amaze NASA

In the first test of its planet-hunting ability, NASA's new spacecraft Kepler has shown that it can indeed detect planetary objects...

Chronicle 8.6.09 6:56 PM

West Nile down, but officials urge caution

West Nile virus appears to be less widespread in California this year than last so far, but public health and vector control experts...

Chronicle 8.5.09 4:00 AM

After shuttle lands, a celebration with sushi

Space shuttle Endeavour and its seven astronauts returned to Earth on Friday, completing a long but successful construction job that...

Chronicle 8.1.09 4:00 AM

High-tech undies in high-tech test

In what might embarrass less adventurous souls, astronaut Koichi Wakata is returning to Earth with the underwear he kept on for a...

Chronicle 7.31.09 4:00 AM

Panel recommends priority for swine flu vaccine

A federal panel recommended Wednesday that pregnant women and others at high risk for serious complications from the swine flu get...

Chronicle 7.29.09 3:57 PM

Shuttle Endeavour heads home from space station

After 11 days together in orbit, Endeavour undocked from the international space station on Tuesday and began its trip home, leaving...

Chronicle 7.29.09 4:00 AM

Debate over of testing breast tissue density

Doctors have known since the 1970s that dense breast tissue can mask tumors, but it is only in the past few years, with the advent of...

Chronicle 7.27.09 7:55 PM