Summer sale: Save 58%

Randolph E. Schmid

Industrial plants in the Qixia district of Nanjing, China.

Global warming pause linked to sulfur in China

Randolph E. Schmid

This undated handout photo provided by the journal Science shows a trench connecting both areas of the site in Alaska. Some 11,500 years ago one of America's earliest families laid the remains of a three-year-old child to rest in their home in what is now Alaska. Today archaeologists are learning about the life and times of the early settlers who crossed from Asia to the New World, researchers thank to that burial. (AP Photo/Ben A. Potter, Science) (AP)

Earliest human remains found in U.S. Arctic

Randolph E. Schmid

Scientists find unusual bacteria in California

Randolph E. Schmid

Post Office lost $8.5 billion last year

Randolph E. Schmid

New microbe discovered eating Gulf oil spill

Randolph E. Schmid

Stamp prices going up again, to 46 cents

Randolph E. Schmid

New fossils may fit in gap between apes and humans

Randolph E. Schmid

Cloak of invisibility takes a step forward

Randolph E. Schmid