|  Esteem issues determine how people put their best Facebook forward  | How social media users create and monitor their online personae may hint at their feelings of self-esteem and self-determination, according to an international team of researchers. | Read More » Toxic methylmercury-producing microbes more widespread than realized  | Microbes that live in rice paddies, northern peat bogs and other previously unexpected environments are among the bacteria that can generate highly toxic methylmercury, researchers have learned. | Read More » Twister history: Model to correct tornado records for better risk assessment  | In the wake of deadly tornadoes in Oklahoma, researchers have developed a new statistical model that will help determine whether the risk of tornadoes is increasing and whether they are getting stronger. | Read More » Earth's wobble 'fixes' dinner for marine organisms  | The cyclic wobble of the Earth on its axis controls the production of a nutrient essential to the health of the ocean, according to a new study. The discovery of factors that control this nutrient, known as "fixed" nitrogen, gives researchers insight into how the ocean regulates its own life-support system, which in turn affects the Earth's climate and the size of marine fisheries. | Read More » Fireballs in Jupiter's atmosphere observed by amateur astronomers  | The solar system is crowded with small objects like asteroids and comets. Most have stable orbits which keep them out of harm's way, but a small proportion of them are in orbits that risk them colliding with planets. | Read More » Assumptions about origins of life challenged  | Before there was life on Earth, there were molecules. A primordial soup. At some point a few specialized molecules began replicating. This self-replication, scientists agree, kick-started a biochemical process that would lead to the first organisms. But exactly how that happened -- how those molecules began replicating -- has been one of science's enduring mysteries. Biochemists now offer an intriguing new view on how life began. | Read More » Changes in Saturn's Moon Titan's surface brightness point to cryovolcanism  | Changes in surface brightness on Titan observed over four years by NASA's Cassini spacecraft have added to evidence that cryovolcanism is active on Saturn's largest Moon. Astronomers compared many volcanic-like features, such as flows, calderas and craters, with similar geological features found on Earth to study the possibility of cryovolcanic activity within regions observed close to Titan's equator. | Read More » Get ready for Rosetta's wake-up call with activity schedule for target comet  | After a journey of almost ten years, the Rosetta mission has just a few months left to wait before beginning its rendezvous with a time capsule. Comet 67P/Churymov-Gerasimenko is a dirty snowball of ice and dust that preserves material from the formation of the Solar System 4.5 billion years ago. | Read More » Catastrophic collapse of ice lake created Aram Chaos on Mars  | Aram Chaos, the lumpy, bumpy floor of an ancient impact crater on Mars, formed as a result of catastrophic melting and outflow of a buried ice lake. A new study combines observations from satellite photos of the 280 kilometer wide and four kilometer deep crater plus models of the ice melting process and resulting catastrophic outflow. | Read More » | |
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