Researchers in positive psychology find that giving is better than receiving, that social relationships are key, and that money can – in some circumstances – buy some happiness.

Three giant new reserves, extend 50 miles out from shore, will protect coral reefs, fish, clams, and other life forms. But how effective are marine protected areas?

Oils in spent coffee grounds are easily converted into biodiesel — a renewable source of transportation energy. Bottoms up for CofFuel?

Carbon tax or carbon trading? As the United Nations gets set for (another!) pow-wow on global warming, policy wonks are focusing on two mechanisms to reduce carbon pollution. Which gets more control at a lower price: carbon tax or carbon cap-and-trade?

Happy Thanksgiving! We celebrate eating — and food. Hungry: Is that your “food clock” ringing? Why does a fruitfly need to smell? How does bitter taste to you? And could eating MSG make you fat?

Each hour, the ocean dissolves 1 million tons of carbon dioxide from burning fossil fuel. As the water grows more acidic, sound travels further. What will happen to marine mammals, which rely on an exquisite sense of hearing?

Study finds that holding a warm cup of coffee for a few seconds can make us see other people as warmer, more outgoing. How come?

A single neuron in the brain may deliver enough information to control a muscle. These results could eventually help bypass the spinal cord, allowing paralyzed people to control their own muscles.

The discovery of human embryonic stem cells seemed to offer cures for horrific diseases. After 10 years of research, was that hype? Where are the cures from stem cells?

Rapid melting of Canadian ice sheet suggests that Greenland’s massive ice cap could melt and raise sea level much faster than predicted within a century.