William Mullen

Though his oil paintings and watercolors earned Winslow Homer a reputation as one of America's greatest artists, much remains unknown, nearly 100 years after his death, about how he created...

If Winslow Homer's painting techniques were a mystery, even less can be said of his personal life. He grew up in a middle-class Boston home and was close all his...

The ancient pigment called Maya blue -- the color of a bright, cloudless Caribbean sky -- has long fascinated scientists with its ritual uses and mystified them with its durable...

A landmark exhibit that had towered over the west side of Brookfield Zoo for 72 years was torn down Thursday to make room for a new habitat that zoo officials...

Even before they are born, all people carry genetic baggage, genes that were useful to distant, non-human ancestors but are hopelessly outdated, even harmful, to humans as they live today....

Powerful computer technology, one of the wonders of the early 21st Century, is being used to re-create one of the 19th Century's greatest events, the 1893 World's Columbian Exposition. The...

Shedd Aquarium will close its popular Oceanarium marine mammal building "for several months" starting in September to allow construction crews to update and renovate existing exhibits and create new ones....

George Washington Carver, born as a slave in the middle of the Civil War, rose to become one of the most famous scientists in the early 20th Century and a...

The first humans to reach the South Pole took shelter under a tent and made their scientific observations using two sextants, a hypsometer for measuring heights, a barometer, four thermometers...

Anywhere on Earth this would be a big telescope, as high as a seven-story building, with a main mirror measuring 32 1/2 feet across. But here at the South Pole,...