NASA's Messenger craft has been orbiting Mercury for 88 days. Among its findings: a Saturn-like magnetic field, high concentrations of sulfur, and some support for the notion there is water ice in shadowed craters.
Mercury had been excluded from the travels of instrument-loaded orbiters because of the difficulty of the mission – until now. On Thursday, the NASA MESSENGER started orbiting the planet.
A new energy revolution – similar to shifts from wood to coal to oil – is inevitable as climate change and oil scarcity drive a global search for sustainability in power production. But even the promise of renewable energy holds drawbacks.
The Kremlin's top meteorologist said that Russia's recent spate of extreme weather and wildfires 'are signs of global warming.' That's not quite right, say climate scientists.
Research shows that many areas of today's oceans have conditions that parallel those of 250 million years ago, when 95 percent of marine species quickly died out.
A warmer world will have adverse effects on wildlife. We can help save animals, but it will take savvier approaches, scientists say.
The US will launch the Kepler spacecraft Friday to look for other Earths.