This story appears in the March 2011 issue of National Geographic magazine. The master spent his last day of life wrapped in a quilt stitched by his wife, his rasping, irregular breaths filling the ...

When is the coldest stretch of the year in your corner of Canada?

Our computers can display an astonishing range of symbols. Unicode alone defines more than 150,000 characters, covering everything from mathematical operators and phonetic alphabets to emoji and ...

Abstract: Multisensor remote sensing applications require the registration of optical and synthetic aperture radar (SAR) images, which presents challenges due to significant radiometric and geometric ...