Explore the entire Earth's surface from highest peaks to mysterious depths.
This tiny squirrel-sized creature would later evolve into a diversity of mammal species including humans.
Nearly every month of 2012 was warmer than in nearly every one of the years recorded since 1895.
The dangers in introducing icy frozen turkeys to a pot of searing hot fry oil. Just part of our wall to wall Thanksgiving coverage.
How Solar Eclipses Work: When the moon covers up the sun, skywatchers delight in the opportunity to see a rare spectacle.
The deadliest hurricane in the period since 1851 hit Texas in 1900 and claimed 8,000 lives.
Follow the path of hurricane Sandy as it casuses more than 150 deaths and billions of dollars in damages.
Hurricane Irene was a billion-dollar disaster, but it is dwarfed in terms of size by Hurricane Sandy.
If you took the ice in all of Earth's mountain glaciers, it would make a cube with 34-mile-long sides.
The daredevil's jump from 120,000 feet altitude requires the use of a space suit due to the low temperature and thin air.
Scientists know the basics of what happens during a lightning strike. But the details remain hazy.
A new NASA image based on satellite data shows that the extent of Arctic sea ice in September 2012 has hit a new record minimum, compared with the average minimum extent for the past 30 years.
The human body can tolerate drastic departures from normal conditions. But what are its absolute limits?
A scientist says that the United States experiences cycles of violence that peak every 50 years. If so, the next peak of violence will occur in 2020.
More than half of the continental United States this summer is experiencing moderate to extreme drought, according to reports released by the National Weather Service.