Ron Eglash, a professor at Rensselaer Polytechnic Institute, teaches math to middle-school students in Ghana....

The federal agency that oversees two government-chartered mortgage companies imposed new restrictions Tuesday on homeowners' ability to take advantage of a program that allows them to repay the cost of installing solar panels and other energy improvements through an annual surcharge on their property taxes....

Envision Solar designs and builds "solar groves," 1,000-square foot canopies that shade parking lots while generating clean power from an array of photovoltaic panels....

In praise of one of the quiet heroes of earth science.

A voracious appetite for bushmeat in Congo's Ituri forest threatens the survival of isolated Pygmy tribes....

The federal government has just finished construction on a zero-energy office building, the nation's largest, and is hoping that commercial developers will follow its lead....

A pioneering hematologist whose research on iron helped improve nutrition and led to advances in diagnosing and treating anemia....

A Dutch government agency presses the intergovernmental climate panel to explain its sometimes murky procedures....

A pulp and paper companies denied a claim by Greenpeace that a subsidiary secretly expanded its mills....

An Alabama bed-and-breakfast that was restored after hurricane damage is struggling now....

A study found that male birds are able to better control their vocal muscles than female birds....

A sperm whale that lived 12 million years ago had upper and lower teeth, scientists reported....

The nervous system sends messages back and forth from the brain throughout the body. The bigger the animal, the greater the distance traveled....

Do the lengths of squirrel tails affect their health and longevity?

A letter to the editor.

Letters to the editor.

A letter to the editor.

Brian Hare and Vanessa Woods have been studying why bonobos are more peaceful than chimpanzees....

Precision drilling has been improved and expanded over the years, aided by advances in sensors and processing....

A new study suggests that foods high in added sugar may increase the risk of high blood pressure....

A study was stopped abruptly last year after 10 elderly men taking testosterone suffered serious cardiac problems, compared with only one in a control group....

For women, a new study suggests, physical activity during the teenage years may provide the greatest benefit....

Untold numbers of unused, and reusable, health care supplies and equipment end up in millions of tons of health care industry trash....

In facing alopecia areata, a disease with no universally effective treatment, Matt Kelley joined a support group and slowly regained his sense of self....