This Groundhog Day's prediction of an early spring may be cold comfort to hibernators. Global warming is disrupting long winter's naps, sometimes fatally.
If life as we know it exists on the red planet, it would have to be deeper under the surface than current probes are able to detect, a European team concludes.
A new image shows a mass of organic material that almost engulfs Titan's north pole, offering proof that the moon has a "methane cycle" similar to Earth's water cycle.
Though derided by critics as alarmist, the IPCC—which releases a major report Friday—may actually be too conservative, says a study of the panel's recent forecasts.
