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The rotation of the Earth's inner core may be reversing, scientists have found in a study that sheds new light on geological processes occurring deep within our planet. The results of the research, published in the journal Nature Geoscience, indicate that changes in the rotation of the inner core could take place on a scale of decades. The study's authors told Newsweek the findings have implications for our understanding of how the core influences the other layers of the Earth.... ...these changes are likely part of an oscillation that takes place over roughly seven decades, with a previous turning point...

It is frustrating, at a time when other nations are in ascendancy in space, that the administration of U.S. President Barack Obama seems committed to undermining the nation's own solar system exploration program. The Obama administration cut NASA's planetary-sciences budget by 20 percent in 2013. It has taken the National Research Council's (NRC) recommendations for prioritizing planetary investments in bad economic times and turned those recommendations upside down. The administration continues to favor large, directed projects at the expense of programs and missions that are openly competed.

When squeezed to pressures and temperatures like those inside giant planets, water molecules are less squeezable than anticipated, defying a set of decades-old equations used to describe watery behavior over a range of conditions. Studying how molecules behave in such environments will help scientists better understand the formation and composition of ice giants like Uranus and Neptune, as well as those being spotted in swarms by planet hunters. The new work, which appears in the March 2 Physical Review Letters, also suggests that textbooks about planetary interiors and magnetic fields may need reworking. “At this point, it’s worth putting together...

(CNN) -- Astronomers announced this week they found a water-rich and relatively nearby planet that's similar in size to Earth. While the planet probably has too thick of an atmosphere and is too hot to support life similar to that found on Earth, the discovery is being heralded as a major breakthrough in humanity's search for life on other planets. "The big excitement is that we have found a watery world orbiting a very nearby and very small star," said David Charbonneau, a Harvard professor of astronomy and lead author of an article on the discovery, which appeared this...

The most dramatic cosmic impact in recent history has gathered up almost as many weird explanations as it knocked down trees, writes Duncan Steel. Sooner or later, it was bound to happen. On June 30, 1908, Moscow escaped destruction by three hours and four thousand kilometers — a margin invisibly small by the standards of the universe. So begins Rendezvous with Rama , a 1972 novel by Arthur C. Clarke in which mankind learns the hard way about the dangers posed by incoming asteroids. The 2077 impact in northern Italy that Clarke goes on to describe is fictional: the 1908...

Scientists at the Sandia National Labs in Albuquerque, New Mexico have accelerated a small plate from zero to 76,000 mph in less than a second. The speed of the thrust was a new record for Sandia’s “Z Machine” – not only the fastest gun in the West, but in the world, too. The Z Machine is now able to propel small plates at 34 kilometers a second, faster than the 30 kilometers per second that Earth travels through space in its orbit about the Sun. That’s 50 times faster than a rifle bullet, and three times the velocity needed to...