ScienceDaily: Top Science News |
- Mayfly with springtail hitchhiker: Amber specimen -- 16 million years old -- reveals unknown animal behaviors
- Giant impact scenario may explain the unusual moons of Saturn
- Keck observations bring weather of Uranus into sharp focus
- Why are U.S. Eastern seaboard salt marshes falling apart?
- New model reconciles the Moon's Earth-like composition with the giant impact theory of formation
- Evolutionary origins of our pretty smile
- Moon was created in giant smashup; Vaporization of impactor left signature in tiny excess of heavier form of zinc
- Multivitamin use among middle-aged, older men results in modest reduction in cancer, study finds
- Extreme 'housework' cuts the life span of female Komodo dragons
| Posted: 17 Oct 2012 03:13 PM PDT Stunning images from a CT scan of amber have revealed the first evidence of any creature using an adult mayfly for transport. Researchers say this 16-million-year-old hitchhiker most likely demonstrates activity that is taking place today but has never previously been recorded. |
| Giant impact scenario may explain the unusual moons of Saturn Posted: 17 Oct 2012 12:48 PM PDT Among the oddities of the outer solar system are the middle-sized moons of Saturn, a half-dozen icy bodies dwarfed by Saturn's massive moon Titan. According to a new model for the origin of the Saturn system, these middle-sized moons were spawned during giant impacts in which several major satellites merged to form Titan. |
| Keck observations bring weather of Uranus into sharp focus Posted: 17 Oct 2012 12:39 PM PDT In 1986, when Voyager swept past Uranus, the probe's portraits of the planet were "notoriously bland," disappointing scientists, yielding few new details of the planet and its atmosphere, and giving it a reputation as a bore of the solar system. |
| Why are U.S. Eastern seaboard salt marshes falling apart? Posted: 17 Oct 2012 11:18 AM PDT Salt marshes have been disintegrating and dying over the past two decades along the U.S. Eastern seaboard and other highly developed coastlines, without anyone fully understanding why. Scientists now report that nutrients -- such as nitrogen and phosphorus from septic and sewer systems and lawn fertilizers -- can cause salt-marsh loss. |
| New model reconciles the Moon's Earth-like composition with the giant impact theory of formation Posted: 17 Oct 2012 11:17 AM PDT The giant impact believed to have formed the Earth-Moon system has long been accepted as canon. However, a major challenge to the theory has been that the Earth and Moon have identical oxygen isotope compositions, even though earlier impact models indicated they should differ substantially. A new model accounts for this similarity in composition while also yielding an appropriate mass for Earth and the Moon. |
| Evolutionary origins of our pretty smile Posted: 17 Oct 2012 10:18 AM PDT It takes both teeth and jaws to make a pretty smile, but the evolutionary origins of these parts of our anatomy have only just been discovered, thanks to a particle accelerator and a long dead fish. |
| Posted: 17 Oct 2012 10:18 AM PDT It's a big claim, but scientists say they have discovered evidence that the Moon was born in a flaming blaze of glory when a body the size of Mars collided with the early Earth. The evidence might not seem all that impressive to a nonscientist: a tiny excess of a heavier variant of the element zinc in Moon rocks. But the enrichment probably arose because heavier zinc atoms condensed out of the roiling cloud of vaporized rock created by a catastrophic collision faster than lighter zinc atoms, and the remaining vapor escaped before it could condense. |
| Multivitamin use among middle-aged, older men results in modest reduction in cancer, study finds Posted: 17 Oct 2012 09:39 AM PDT In a randomized trial that included nearly 15,000 male physicians, long-term daily multivitamin use resulted in a modest but statistically significant reduction in cancer after more than a decade of treatment and follow-up. |
| Extreme 'housework' cuts the life span of female Komodo dragons Posted: 17 Oct 2012 07:29 AM PDT Researchers have found that female Komodo dragons live half as long as males on average, seemingly due to their physically demanding "housework" such as building huge nests and guarding eggs for up to six months. |
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