ScienceDaily: Top Science News |
- New chemical reaction could explain how stars form, evolve, and eventually die
- Point of light: Light-focusing device may lead to applications in computing, communications, and imaging
- Monkey business: What howler monkeys can tell us about the role of interbreeding in human evolution
| New chemical reaction could explain how stars form, evolve, and eventually die Posted: 07 Dec 2012 02:44 PM PST Researchers have discovered a molecular-level interaction that science had puzzled over for decades but had never seen. That discovery, it turns out, may redefine how science views chemical compound formation. It also answers questions about what goes on in places like white dwarfs, the super dense cores of stars nearing the end of their life cycles.  |
| Posted: 07 Dec 2012 07:17 AM PST Engineers have created a device that can focus light into a point just a few nanometers (billionths of a meter) across -- an achievement they say may lead to next-generation applications in computing, communications, and imaging.  |
| Monkey business: What howler monkeys can tell us about the role of interbreeding in human evolution Posted: 07 Dec 2012 07:16 AM PST Did different species of early humans interbreed and produce offspring of mixed ancestry? Recent genetic studies suggest that Neanderthals may have bred with anatomically modern humans tens of thousands of years ago in the Middle East, contributing to the modern human gene pool. But the findings are not universally accepted, and the fossil record has not helped to clarify the role of interbreeding, which is also known as hybridization. Now a study of interbreeding between two species of modern-day howler monkeys in Mexico is shedding light on why it's so difficult to confirm instances of hybridization among primates -- including early humans -- by relying on fossil remains.  |
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