Results from a new study show that the water-rich iron mineral ferrihydrite may be the main pigment behind Mars’ reddish dust ...

A mystery contained within a century-old camera bought at an antique shop in Salisbury may have been solved by some online ...

Why retinoic acid is effective in this setting but not against primary tumors, has been speculated about for nearly 50 years.

"Watson" star Morris Chestnut spills the secret on how he looks so great at 56 for USA TODAY's The Essentials.